Hi so I've had a couple scares in my sexual life but this time I'm really worried. I'm 19 and have been in a sexual relationship with my boyfriend for the past year and a half ❤️. I'm on the pill and he always uses a condon, except for one time last week he finished inside me. This was a few days before I was suppossed to get my period. I took my last pill on Saturday night and got my "period" Wednesday morning which is normal for me, I had a pretty consistent light flow throughout the week and it stopped on the Sunday/Monday which is normal. I woke up Monday morning and had to return home from school because I was so nauseous. I slept it off and felt fine but that is highly unusual for me. For the last couple days I have heavy white discharge and yesterday it was slightly pink. I also had cramping and the worst back acheyesyerday. The cramping  got quite bad last night and still feel it slightly this morning. I took a pregnancy test first thing this morning and it came up negative. I'm going to wait a week to take another one but I'm really concerned. Any help or advice would be appreciated!