I can't remember if I touched it again..his "pre cum." But I'm nervous. And hope that nothing stayed on my fingers.

We talked after...I did not continue the hand job or touching him at all. We talked for at least 2 mins. (Don't know if that helps but I heard that sperm doesn't survive much outside.) Before I went to the restroom to deal with my period emergency.
(I started my PERIOD yesterday.)
I saw a blood clot on the pad so I (like any other panicked girl.) dipped my fingers into my vagina to check what was going on with THE SAME HAND that I used to run over his boxer briefs minutes before... ( I know that's not advised but these clots were scary and I had to see what was coming out.) And now I am scared that maybe somehow his pre-cum got in.
I didn't feel like my hand was wet or that it had anything on it. I mean I touched several surfaces. His T- shirt. My cotton pants. Door knob.