Possibly Pregnant??

Need some reassurance here...

My boyfriend and I had sex for the first time during the days glow said I was ovulating (not sure if it was accurate or not). We used a condom all 4 times and 2 out of the four times he pulled out, I’m also NOT on the pill but will be going on it soon.

A few days later I experienced symptoms of a UTI (blood in urine, burning sensation, foul smell, urge to pee) I went to the doctor and it tested negative and the next day the UTI symptoms went away and I got extremely bloated.

Last night we had sex again (w condom) and before he could even finish, he noticed stringy red/brown blood on the outside of the condom. I got excited bcuz we’re not TTC and put a tampon in because I though AF came.

This morning I got up and the tampon wasn’t full at all. I’m supposed to get AF tomorrow 12/7.

I have been testing for pregnancy and it’s all been negative. I’ve been super nervous/stressed out. Is this just my nerves?????