Please help...

About 2 months ago around the time of ovulation I had sex and the condom slipped a bit. Since then I’ve had 2 “periods” which have been a bit lighter than usual but still lasted around 5-6 days with a few little clots. But was definitely enough to leak from a tampon and fill pads.

I’ve had cramp and breast tenderness intermittently after ovulation time until AF, which I’ve never really had before.

I’ve taken 4 HPTs at various times for the last 2 months (one day period was due, one 2 weeks after period started, one at 8 weeks, and one at 11 weeks) and all have been negative, 2 normal and 2 digital.

I’ve only had sickness twice, once at night then the next following morning but it could have been a bug or virus as I also felt tired and spaced for a few days after.

I know I’m probably being very irrational but is there a chance? I don’t want to be pregnant as I’m started grad school in September.