Count me in! It is good to see that others are dealing with it too - no one seems to no how to handle us!
I have had so many fainting spells with my pregnancies (and many as a teen too) and no answer to what causes it. I assumed Low BP, but wasn't able to have it taken when I was passing out. My typical BP at pre-natal appts is about 95/70 (even if I basically run to my appt, run up stairs, sit down and take it) and I have always gotten ' that is good' from both Dr's and midwives. (3 hospital births/2 homebirths) Now, preg. with baby 7, I borrowed my parents Blood Pressure monitor (dad had a bypass, etc.. and has to monitor it occasionally). 2 weeks ago I felt funny, like I needed to rest or do everything sitting down, not passing out, just funny feeling - so I took my BP and it was 68/50!! Slowly throughout the day it rose, and finally was 'normal' by bed time.
I have always used plenty of salt, my non pregnant BP is about 110/80 and I just don't get it. It seems to be tied to a combination of iron level, protein and fluids. I'm almost 15 weeks and my first midwife appt is Monday, so I will see if I get any new ideas how to raise my BP.
Some tips if you have an "I'm going to pass out spell".... often things start to go dark, start sweating, sounds start to diminish etc... (once as a kid I could only see b&w - all color was gone!)
Fastest way to recover and get back to 'normal' if you really feel like you're going to pass out, is - of course lay down FAST - who cares what people think of you, and where you are (unless it's unsafe). It's much better than actually passing out and risking getting hurt. (yes, may want to give up mini skirts for now!) I've laid down in hallways, church, on tile floors, ICU rooms (not my own! lol..), in bathrooms - you name it. Any passer-by's will just have sympathy and ask if they can help..... say yes, have them go hunt down a drink for you!
Then, drinking something sweet - juice (a coke if you have to), and eat some carbs - crackers are easy to keep on hand.
As you're feeling better (eyesight, hearing etc, coming back) slowly prop self up on arm. If that goes OK. Slowly go to sitting. Sit for awhile before trying to get up, or you'll end up back laying on the floor.
If they need to draw blood - ask them to do it while you're laying down. Then they don't have to risk trying to haul you to a room as you are passing out on them! (been there done that!) but typically blood draws during pregnancy are easier because of the increased blood volume.
Good luck ladies, let me know if there is anything that helps you.