pregnant or nah?

So I've had intercourse with this guy for awhile now and he's pretty good but a little rough and defiant. I told him I wasn't ready for a baby and to pull out. He started with a condom but then took it off and I told him to stop because I didn't want to get pregnant he kept going anyway and He did what I told him not to do. So I immediately became worried. So instead of taking a pregnancy test I decided to play the waiting game for a few weeks. But I got frustrated and took a test and it said negative. I used a firstresponse calculator on line to decide if I was pregnant how far along I would be and it said 4 weeks. I panicked again. I end up having intercourse with him again without a condom and he is a little rough and has big penis so he was hurting me. He stroked so hard I squirted urine but it felt awkward and  painful so I pushed him off and told him to stop. He was upset that I didn't let him finish. A week later I started receiving bad pains on the right side of my vagina so I went to the doctor and they said I had a UTI and found blood in my urine and gave me antibiotics and ibuprofen 600mg. I end up having my period on time but my period wasn't normal. It wasn't very heavy period and I kept getting nauseous and throwing up and I was in a lot of pain it all the days of my period sand yesterday was my last day of my period. There were chunks and chunks of blood. After my period I started noticing some pink slimey stuff when I would wipe so I'm concerned about what it might be because I've never seen that before? I feel like I might be pregnant but I'm not sure yet. It's uncomfortable to lay on my stomach and I can only like on my back a short amount of time. I've been eating a lot and still I get nauseous. I'm scared because I know if I am pregnant my mom will kill me. I want to take another test but being that I don't  drive and my parents drive me everywhere it's hard to get a pregnancy test. I'm also scared that I could be having a miscarriage. Idk what to do. I'm screwed.