sara, I had Kat and 10wks later was pg again. My girls are best friends. It was an accident, but I wouldn't want it any other way now. They are great and so wonderful to watch together. I want more, but we'll space them a bit now. So TTC #3 around July next yr so wish me luck for then! As for AF being late. When I found out I was pg with Jess, Af was 1o days late, I had M/S, but HPT's all came back -ve. Bt came back +ve. 10wks pg, I finally got a BFP HPT so U MIGHT be pg. I think the body having just given birth, takes longer for the HGC to get into the urine. Goodluck Sara!