had anal sex with a girl that was virgin. She took a shower beforehand, I did not (I was clean though). I did not use any lubrication. She was on her stomach and I made sure I was not near her vagina. I asked her to make sure and she said yes. The first time I stick it, within 30 seconds, the condom break. I pulled out within a one to five seconds. She was dry, the majority of the condom was still on my penis, and it was not wet. I took it off and put on a brand new one and it worked fine. I pulled out her anus again, pull off the condom, and cum on the right side of her buttocks, not inside her anus. I check real clear to make sure there was not any liquid or cum in her anus and it was not. After we was done, I wipe off with my towel and I wipe her off with both toilet paper and paper towel with a little soap and little dap of water. Later on, I took a normal warm shower and went over my genitals and penis. Then I change my bed sheets before I went to sleep. I call her the next day to checkup on her, and she said she was fine. I am worried do I have HIV/AIDS, STIS, etc. from anal sex. Is my partner pregnant, have HIV/AIDS, STIS, etc. because she was dry before and after sex? She has no disease. How would I know without using Plan B or a Emergency Contraction?