Hi , so I've been on birth control for 3 months months now and have taken them correctly the whole 3 months , one time I "came off " my period on the morning of June 26th and later that day I had rough sex and like 2 hours later , there was period like blood in my undies and I didn't think much considering that I just came off my period , well so I thought ..... I've been off my period for about two weeks now and I had rough sex again , 3 times in a row ... And my vag was swollen a couple hours later and had like a light pink-brown color when I wipe .... I had sex Friday ... And it's Sunday , and It's still there , everything I look up says implantation, and pregnancy stuff , but I don't think that can be true because I'm taking birth control ,someone help , I'm kind of scared , I'm 16 !!