Could I be pregnant ?

Today I had anal sex and we did anal for a good 20 minutes, there was alot of spit so idk if there was precum (he says there wasn’t precum but I know boys can’t always feel it) I did not feel him in my vaginal area. He did not finish at any point, could I be pregnant from the spit possibly allowing sperm to my vaginal area and he used his fingers too?. My period is already 21 days late and i’m on cycle day 59.