I'm am 18 years old and started having sex with my boyfriend 4 months ago. Before then I was a virgin. I bled occasionally the first few times we had sex but that was to be expected. We had sex on the 2nd of December and there was no bleeding then I had my period on the 6th. My periods never last any longer than 3 or 4 days so it had cleared up by the 9th.
But then on the 10th I started bleeding heavily for about an hour. The blood was kind of pink and there were clots and brown discharge in places but there was no pain or cramping associated with it. I figured it was just my period clearing up but then I started bleeding again for an hour last night on the 11th and again today when I went to pee. I also noticed a pimple on the outer lip of my vagina but that could just be an ingrown hair or something?
I am so scared and don't know what to think. We have never had unprotected sex. We have always used a condom. I couldn't be pregnant could I? I already had my period after sex. I would like to rule out STIs as a cause as we've always used a condom but we have had unprotected oral sex. I am not on the contraceptive pill or any other meds
Any help would be greatly appreciated!