Before I go into about my UTI. 6 days ago, I had unprotected sex. My boyfriend pulled out, but he was kinda worried that he didn't pull out in time, so we went to Wallgreens and bought a Plan B pill. I took it the next day. (I never took a plan b pill before)

And about 2 days ago I was experiencing symptoms of UTI. So I went for a check up today and found out that I do have UTI.

Now, I'm experiencing some light bleeding that started today. It looks like I'm on my period but I know I'm not. I told my boyfriend and he said that I might be bleeding because of the plan b pill, and that my uterus is probably flushing itself.

Is the bleeding from the UTI or the plan b pill?