Am I stressing

I had unorotective sex for a couple of seconds and he didn't cum. A couple weeks later I bled for a week and it was somewhat clotty and I read that if your period is clotty then you're safe. But idk I still felt that I should have taken a test to make sure and I did and it came out negative right away, I followed directions and everything. But yesterday when i went to the bathroom there was a clear/bloody discharged when I wiped and I thought "oh yay! Period!" Since I'm irregular but after that... Nothing... Then this morning same thing but slightly lighter. So like wtf. I'm confused. Has this happened to anyone? I just hope I'm just stressing too much and is nothing. Please help me out thank you