This happened to me the month I first got pg back in March, was running into bathrooms with a tampon as soon as I arrived anywhere and AF never came, like CIMC I didn't manage to hold onto that little one, but one evening I was staying over at my friends house and I was 4 days late and ran into her bathroom as soon as I arrived and came out saying "This is really weird, I feel like AF started all the time but it hasn't" and she said "Yeah, that happened to me when I fell pregnant" (she was 5 months at the time and had a gorgeous girl in June). I was testing every morning and getting BFN's though so thought for definite I wasn't pg, but my + didn't show up until I was 6 days late. I guess what I am getting to is ~ Have you tested??!!!
xxx