I'm going through the exact same thing,my midwife couldn't figure it out so he sent me to cordio. It turns out that I'm dehydrated and have low blood pressure issues. Plus I'm also anemic.
Same thing Was Happening To Me Around That Time...I Was Told My Hormones Were Still Going Up And Down Triggering My Thyroid,Causing ME To Faint...But it Did Go Away. After Hitting The Second Trimester Things Started To Get Better. HopeThings Get Better For You As Well. (I Am 31 Weeks Now)
I whent through the same thing with my pregnancy with my 4y daughter. Never did find out why it was happening. Though it stoped after she was born. Shoot im still embarrassed about passing out at the walmart caher.
I was hacing problems with almost fainting and they figured out that my blood pressure was too low... I was on high blood pressure medication but the pregnancy stablized my blood pressure and I was taken off of it. I have also almost fainted when I went too long without food and my blood sugar dropped.. im not diabetic but I might have gestational diabetes... have you been tested for that yet??
I also have a low blood pressure (my normal is 90/65). I have fainted in both my pregnancies. The doctor said it was probably from going from sitting to standing to quickly. My PCP looked over the labs they did in the ER and she told me my blood sugar was low. I'd say take your time going from sitted to standing. Also make sure you eat/drink often. I'd continue questioning my doctor if the problem continues.
I have naturally low blood pressure and if I move to quick, stand to fast, don't eat enough (eating every 2 hours, small snack) or I dont stay hydrated enough I will pass out.
Mu aunt had it it became so normal that my uncle already knew when to catch her, it could be anything, eespecially the hot ! It happened to me only once so far and my doc told me that when I felt like it was about to happen to put a lil bit of salt on my tounge
Maybe you have postural hypotension? I tend to pass out if I stand up too quickly, or if I yawn and stretch my arms up over my head. I've never been diagnosed, but I've never been to a doctor for it either, because I've never gotten hurt or had it interfere with my day to day life.
Is there any time or place that you TEND to pass out? IE does it only happen in crowded places, certain parts of the neighborhood, etc?