I had a bleed which I thought was AF, before getting a +ve HPT 3 weeks later . BT said I was 7 weeks along though. Unfortuatly that PG was not ment to be as u/s at 10 weeks showed I had a missed m/c. I guess I'm saying that bleeding can happen and you can still be PG. Many women can go onto have happy and healthy PG. My fingers are crossed you are one of them.