It sounds as though as you have undergone comprehensive testing for your symptoms. If your holter monitor, ECG, echo, and stress test were normal, this is extremely reassuring that there is no structural abnormalities or significant underlying coronary artery disease. Your cardiac MRI was likely performed to rule out any infiltrative heart disease that could be a cause for your palpitations and syncope. If this is also normal, it may indicate another cause (non-cardiac related) for your symptoms.
Sorry forgot to add my family history - Grandmother (father's side) died age 62 from thyroxin poisoning - had a heart attack at first and then did not take thyroid medication (v sad story but I won't go into it now - consensus was the thyroid issues may have caused the first attack), also grandfather (mother's side) experienced angina in early 50s, and then died aged 75 from first heart attack. Grandmother on mother's side also died of heart attack however this was secondary to pneumonia (I think) and she was 78 at the time.
Yesterday I woke with a strange heavy feeling in my chest, and dismissed it as stomach acid, as I have a strong suspicion that the recent anxiety problems, and perhaps my passed drinking history (never an alcoholic, but certainly heavy on weekends), has caused GERD or perhaps even gastritis. I showered as normal and made a cup of tea, at which point I lit a cigarette before going to work. During smoking of the cigarette, a strong pain developed which felt like it was coming from the bottom of my esophagus, and radiating into my chest. It got lighter after a minute or so, however stayed there and was nagging.
I walked the 1.5 miles I normally do every day to the train station with no relief, and after getting off the train in London decided to go to hospital. I was given 2 ecgs, the first of which came back abnormal however the second was normal - the doctor thought that lead 2 must have been loose on my chest. Also, I was given another chest x-ray and blood tests. My xray was fine, and the bloods showed only slight high ALT and slightly high CRP (5.5) and so I was released. I was given gaviscon which did seem to make the pain subside (not sure if this was related to be honest), and given a prescription for a medication called Omeprazole. I have taken this as directed, however this morning experienced another episode of pain in much the same way. This only last for about 3 minutes and then subsided. It seems to only happen in the morning just after waking up.
I still have chest discomfort and feel swollen in that area, and my left arm has strange numb sensations all the time. I'm a little scared still that I may be suffering from heart disease, and was wondering what the chances were considering my test results so far. I have not heart anything about the cardiac MRI but have been assured that if anything majorly untoward were found then I would have already been notified.
I would really appreciate some advice, and perhaps some reassurance.
Many thanks!