Jumping in from the Dec. DDC -
This is my 2nd PG and with both I've had wierd spotting - more than just a little spotting, but not enough to call it a normal AF. With my first, even though we were trying, I thought I just had an "off" AF - I didn't find out I was PG until 7 weeks 2 days because I thought I had had AF.
DD is perfectly healthy, born after her due date and I had the *easiest* PG EVER with her.
This time, the MW put me on Prometrium, a progesterone, because the initial US (wasn't sure of dates, plus the spotting, so I had an early US) indicated a weak sac and the blood work showed my progesterone numbers a bit on the lower side of normal.
So far, so good with this PG.
I hope the same is true for you!
Oh, and don't worry about symptoms seeming to fade - After some intial queasiness, I really felt wonderful through my entire 1st PG and other than swelling at the end, I had zero complaints/symptoms (other than weight gain).