help me

So one day I was masturbating sorry for TMI but I think I remember touching myself not inserting any fingers in but you know I was just masturbating with clothes on and I did touch myself but the spot that I did it could have sperm but the "sperm" wasn't freshly ejaculated I think it was sperm that could be sitting there for a long time because I wasn't present there when it was ejaculated and also when I was masturbating I didn't feel any wetness on my fingers is there any chance I'm pregnant? I'm really scared I just need really well trusted women who can reply nicely plz as you can see I don't know how conception works