Well, i didnt take my birthcontrol for 2 days, while knowing that me and my boyfriend has had ALOT of sex && the birthcontrol made me be on my period for like 3 days or more because it messed up and its messed up my emotions and personality too for not taking it. Well the 3rd night i did take it and on that night my boyfriend left his tip of his penis inside me and came a little bit then pulled out while my medicine was messed up, i gain and lose weight all the time and started gymnastics and lost then now im gaining again, it happened last week && now im gaining and having pains in my side and stomach && having mood swings && i started taking my birth control again the 3rd day last week like a few minutes before he did that and i took a home pregnancy test and it said negative, could it be wrong? Should i goto the doctor.?