worried there might have been precum

ok so me and my boyfriend were fooling around and i blew him and he fingered me and then ate me out but he never came im worried there might have been precum or something and i dont know if it was on his hands but all he did was take his penis out of his pants thats the only time he touched it so im thinking theres a very slight chance there was precum on his fingers but im not sure. my last period was january 29 and i was supposed to get my period on february 25 but still no period... as of today im 8 days late and im worried. i started playing soccer again this month and ive been stressed with school so idk if that has something to do with me being late and i was sick a couple days ago so idk im just really confused and getting more stressed out over this and i just want an answer please help :(