Every and any help would be greatly appriciated:

Me and my boyfriend had sex on the 16th of July. I had my period right on time from the 23rd to the 30th of July. My cramps were a little more sever than usual and for the last few days (since the end of my period to now), on and off, I have been spotting blood with a bit of clear (as disgusting as this may sound, it almost looks like cum?), sometimes it is brown. And it seems to happen more when I use the bathroom. I'm not sure what it could be, can anyone give me any advice, or has this happened to anyone else before? Can it be a hormone inbalance?? Or could I be pregnant? I'm not noticing any other pregnancy signs..

I took a pregnancy test today, it turned up neg.

One more thing, I just recently had a bladder infection, I was on medication for this, but did not consistently take the pills for it, it no longer hurts when I urinate, and the blood is not coming from there. But could this have anything to do with it?

~Thanks!