Melissa, I agree.   stress... anxiety..  both can cause you to black out like that.  oh, I know just what you mean re the hearing and sigh going then you wake up!   I think you need to destress.    hope you feel better.

i'm sorry this is happening to you.  IMO, I don't think it is part of any change,  It seems like you have so much stress on your plate (from other blogs I read of yours too) that maybe this is how your body is telling you to take it easy.  I'm really glad you got to sleep Monday and Tuesday when you could.  Does your doctor suggest anything; what does s/he say?  I hope you start to feel better soon.

Melissa.

I wish I could help. I don't drive so i ride the bus all the time and even though i ride the bus there are some places i have to walk and it's good excercise for me. hope you feel better soon.