My boyfriend and i had unprotected sex in the beginning of june about four times. once when i was on my period. i know it was irresponsible but it was in the moment. each time he pulled out but still each time he had came, wiped it off and then we started again. i've had some signs of pregnancy such as: sore brests, increased headaches, lower back pain, and changes in my mood. i've also had an increase in vaginal secretion with no signs of infection. i also threw up this morning for no apparent reason and i'm not sure if it's connected. i'm not sure what to do. i'm still in highschool and i'm scared. my boyfriend is worried and he's stressing me out. i'm trying not to stress becasue i know that can delay my period. i should be getting it sometime soon but it comes irreguarly. i did have some spotting about a week after we had sex and i'm not sure if it was implantation bleeding or not. Also, can implantation bleeding happen a month after intercourse? Can any one give me advice.?