Weird period then UTI?

So I started my period on the 8th and I had kinda bad cramps (usually I don't have any), but bleeding was normal and pretty heavy for the first two-three days. After that, I had weird light brown blood/discharge, and then I'm not really sure when my period actually ended because I think I have a UTI now and there's been occasional blood in my urine (sorry, tmi). I've been taking non-antibiotic medicine for it (can't afford the Dr.'s), which seemed to be helping yesterday and the day before, but today the burning is back like no other and my back and stomach hurt really bad. My main concern with this is I hope that his isn't a sign that I'm prego (had sex with condom on the 12th), and secondly, I don't want this UTI to go into a kidney infection. Has anyone else had symptoms like this and could tell me what happened?