implantation bleeding or leftover irritation from uti?? help!!!

so, to give some context on the situation, I had a uti last week that wasn't horribly severe and the antibiotics took care of it quickly. with that, i'm wondering if the three drops of light pink that i saw when i wiped the other day could possibly be due to my bladder being irritated? I had sex a few hours before that and the spotting or whatever it was hasn't happened since. could it be that my bladder was irritated from sex?? or was it implantation bleeding because that would also line up with the 6-12 days it takes for implantation to occur. I haven't gotten my period yet, though it shouldn't be due for a few more days. all of my normal PMS symptoms are active. any advice??