Right I had sex with my boyfriend on the 10th of November, it's now the 26 of January, I've not had my period since August but I've always been very irregular, but I figured that would just be because I started quite late anyway. Anyway about a month after having sex my belly went very hard, and I started having really bad pains, like very severe period pains. So I went to the doctors to see if I was pregnant, they took a test and it was negative but about a week after that my belly went soft again but it's started to stick out, and I've never been fat or really skinny but my stomach was some what flat and now it's sticking out loads, and I keep getting weird noises going on in my belly, what could this be? Has anyone experienced the same?