Me and my girl friend were fooling around. She had just started her period that day. While fooling around I let my hand move to my penis and felt a little pre-*** on my thumb. I wiped it on my pants. Then I pulled down her pants and slapped her butt a few times. Then when she was masterbating I slapped her inner thigh a few times. I know it is stupid to freak out about this but I want to know if it is possible for sperm to travel to the vagina from the thumb even if I never touched her vagina at all. The next week she went to the OBGYN to get her annual checkup and the doctor told her she was not pregnant, then she took a blood test and it also came out negative. We fooled around on a Monday and the following Tuesday she got checked out by the doctor. Then she got the blood work results on a Wed. She also just restarted on her birth control (a stronger dosage) on that Tuesday. My question is could she still be pregnant after al of that or am I just freaking out over nothing.