UTI symptom or possible implantation bleeding?

Now I’m currently dealing with an absolutely awful UTI. Past few days have been the worst of it and I’ve noticed I’ve been bleeding very very lightly. However it looks like it’s diluted pepto pink (weird analogy I know). I did have a pregnancy test done a few days ago which came back negative however I still have yet to get my period so I won’t no for certain until that comes (it would be quite early if I was anyways). Could the blood be from the UTI or could it be possible pregnancy? I’ll be taking another pregnancy test if my period is late irregardless but I would still love some feedback