ugh! ((hugs)) TTC is SUCH a roller coaster.
Ha ha! That would soooo get me going if there was any doubt in my mind that this is AF! A doctor actually told me when my son fainted once, that pregnancy is the most common reason for fainting. Since that was obviously not the case in my 7 year old boy, he concluded that it was probably the start of the flu (he actually didn't get sick after that, but he hasn't fainted again, so it was just one of those things I guess?) I have a friend who fainted 4 or 5 times when she was pregnant, she found it very embarrassing!
I went to the Dr. when DH and I were TTC #1.. just for a checkup and such. They were drawing my blood, and I was talking to the phlebotomist, no problem. Next thing I knew, I was waking up, with my sunglasses down on my face, all sweaty. I had fainted! Luky for me, I pissed my pants too. lol Turns out I was already pregnant!