Ovulation spotting?

I’ve never noticed this before and I’m a little freaked out 😳

Last weekend, 2 days before my fertile week started, me and my fiancé had sex with a condom, and he didn’t finish.

Usually during my fertile week, I have a ton of discharge but it’s always just white and sort of yellow but not a weird yellow. But when I just wiped, there was a ton of it and it looked like old blood mixed in.

I just started taking an antidepressant about 2 weeks ago and I thought that may have something to do with it.

I talked to him about it just now and he said he isn’t worried at all. I’m just a little freaked out.

What could it be? Is there a chance I could be pregnant even though I know the odds are extremely slim?