so this is how it happend. it was 12th of july when me and my long time boyfriend had UNPROTECTED sex and he EJACULATED inside me.. i have and IRREGULAR cycle... so on friday 13th of july in the afternoon i had my period .. on the night of it.. it was gone .as in totally gone.. my period came back on saturday noontime. oh hell. why is this happening.. then my period lasts for 4 days.. .. now im experiencing headache and light abdominal cramps...me and my boyfriend decided to have a home preg. test on sunday july 29 and we had it negative but im confused.... and we're scared... we'll have to do a test again this coming sunday.. but then could anybody pleas tell me what's going on? im so scared. coz ive read in other forums that it maybe sometimes a false negative in which you will find your body bloating and you're pregnant phulllease .. anyone help me...