I am 19 years old, and 12 days ago had unprotected sex but practiced coitus interruptus (removal before ejaculation). I have done this several times in the past without getting pregnant, but yesterday I felt a sharp pain near my ovary. I didn't think it was ovulation because I had already felt what I thought was ovulations about 8 days prior. I'm worried that it could have been implantation, as later that day my urine was pink - no spotting on the toilet paper, but pink fluid in the toilet bowl. Also, I've been having cramps all morning. I've never spotted before, so I'm really concerned. One odd thing - I also had a milky discharge once this morning. The best way to describe it is mucus-like only white-ish. I don't think that's normal for implantation, but I really don't know.
I don't think it's likely that I'm pregnant, but I would like an opinion.