I lost my virginity back in April. We used a condom, he didn't finish inside of me, but the condom did slip off half way through. He caught it though before he finished and pulled out. I took the morning after pill about 6 hours after having sex. I haven't missed any periods since then and I haven't gained any weight, but just within the past few days I've been extremely bloated and constipated and had to pee a lot. I've messed around with two other guys since then, but I haven't actually had any penetrating sex. I went to a clinic back in June to get a pregnancy test and it was negative. I just don't understand why my stomach feels so big, why I can't poop, and why I've been peeing so frequently lately.