Brown discharge ?

Soooo I got off my period September 6th, and I had sex September 9th it was rough and we had sex 3 times that day and I bled after didn’t think anything of it I just thought maybe it was too rough, had sex the next day and I bled and today I had brown discharge ? Only a little tho, I don’t know if it’s mt body’s way of cleaning itself after the bleeding I just had or what lol, but I also was on antibiotics for a UTI witch made my period 6 DAYS LATE! ( don’t worry it was a normal full period) but it affected my flow lol h e l p :/ I’m suppose to be ovulating today and I have watery discharge like usuall ( not on birth control ) so it’s not breakthrew bleeding