Welcome to the gastroenterology community! It sounds like you might have a dysautonomia. I would recommend posting in that community and see if they can give you any advice.
I have checked my heart rate and blood pressure when I am lightheaded to the point of almost passing out, and my blood pressure and heart rate hasn't dropped. I had an episode while wearing a Holter monitor and everything was normal. My heart rate has been in the 90's since the lightheadedness came on all of a sudden. I have been really nauseous lately, and I have a dull pain in my lower left/center abdomen/pelvic area. The episodes start with cramping in the lower middle of my stomach, and then I may or may not have shortness of breath, and then lightheadedness. I do have mild lightheadedness throughout the day.
Oh, and I have had premalignant colon polyps removed about 15 years ago.
Have you done a laying down, sitting, then standing blood pressure and pulse?
Yes. My heart rate and blood pressure remain in the normal range. I have had a lot of stomach issues over the years, and I can feel my hernia acting up. The hernia is referred to as the "great mimic" because it can cause the same symptoms as having a heart attack. I think that is why people with heartburn end up in the hospital thinking they are having a heart attack. The vagus nerve gets irritated, and triggers signals that cause the symptoms.
I have been taking Pindolol and Fludrocortisone as the doctor prescribed, and haven't stopped shaking since I started. I thought I was going to pass out last night over a few hour period, and almost went to the hospital. I checked my heart rate and blood pressure when I got home, and my hr was 105, and my bp was 145/83. So, I am having the symptoms due to the hr and bp being too high not too low like they are expecting. I am going to log my hr and bp today so that I can give the information to the cardiologist and to my gastroenterologist next week.
If the shaking started after you started these medications, I would recommend that you talk to your doctor about switching your medications.
My symptoms are not fitting into a nice box, so the doctors seem to be a little confused. When I told the cardiologist about the shaking, he had me start taking Fludrocortisone. I think he thought I was shaking due to low blood pressure, but it was the opposite. My general practitioner said that whatever is causing the lightheadedness, could be causing my heart to work harder to compensate, and is causing my heart rate to become elevated.
I was in a bad car accident 20 years ago and almost bled to death in the hospital. My blood pressure stayed normal until it all of a sudden it bottomed out. My liver had been torn and was filling my abdomen with blood, but I was showing no signs until it was almost too late. I have been having gastrointestinal issues ever since.
Trauma can definitely be a cause for a dysautonomia. Have you asked about your problem on the dysautonomia community yet?
I had similar symptoms after turning 40, could be peri menoapuse and low vitamin B12..I am now almost 49 and much better I quit all the meds, Xanax, Nexiums, etc. Many meds lower your B12 dramatically which can cause lighteadedness etc. Take B12 , it is the safest vitamin to take. It will make your pee more yellow as you excrete the excess your body doesn't need! Try to get off all of the meds and make Non fat yogurt mixed with frozen no sugar added fruit to make smoothies, have one tall glass of smoothie a day. That will soothe your hernia and digestive tract too.. Cut ourt chocolate, soda and caffeine and spag sauce, pizza.You may want to all decrease or stop eating pasta, bread, cookies any gluten for awhile too. Rice pasta tastes the same, bread we can all eat less of This will help cleanse and lighten the load in your digestive system while it gets re-balanced.
My B12 was in the normal range but low. So, I have been taking a liquid supplement. I am going to order methylcobalamin b12 and start it this week. I read that the stomach doesn't always convert b12 correctly while taking acid reducing medicine. I have Kefr, but will try to make sure to drink it everyday and will try the yogurt smoothie. Do you know if there is a difference between regular and greek? I have cut out the caffeine and anything with tomatoes. I have been eating a lot of eggs for the b12, spinach, and other vitamin rich foods. I normally have a really bad couple of months with reflux starting in January, but I was hit with this instead this year. That is why I am thinking it is stomach related. Last year was a very stressful year. In April/May I lost my dad, found out my mom has dementia, my daughter fractured her nose, and I was layed off all in a few weeks. I then started a new job about a month later. I bought my first new car over the holidays, and then turned 40 the day after Christmas. Hopefully things will get better soon! Thank you for the advice.
Lyme Disease test came back negative. My EBV VCA IgG (>749.9) and EBNA were positive, and IgM was negative. Gastro didn't find anything. Some of my symptoms are improving, so I am waiting to see what happens at the dizziness and balance clinic next week.