I'm 16 and my boyfriend and I have been having unprotected sex.. a lot. I was supposed to have a period the 21st of may and I haven't had it yet. And my periods aren't like clockwork but I always have one each month. I also feel bloated all the time and my boyfriend has noticed my boobs getting bigger. Sometimes I just feel really fat which isn't normal because I only weigh 115 pounds. I am also having a lot of discharge and a little cramping here and there like my period is coming. And I am moody, but extremely moody lately, I cry all the time and then an hour later I will be really happy again. I have taken two pregnancy tests and both have come back negative. But I can't seem to find any other explanation of why. I need some help if anyone else has gone through this or what is going on? Please and thank you. Also no negative comments please I know that I'm really young and this isn't really good at all.