Me and my girlfriend were alone and we got extremely horny. We started dry humping, from there I decided to take my penis out and try to dry hump her that way. She then took her pants off and had only her panties, so I kept at it. After that we stopped and I finished myself off. I washed my hands and penis soap, I also told her to watch her hands. She seemed unsatisfied so I tried giving her pleasure with my hands. After4 days, she got her period 3 days early and I just want to know if this is pregnancy or just somethign else