15 second intercourse

If we only have sex for 15 seconds, can i still get pregnant?

cassey
asks:
my period is due any day now. and about 10 days ago me and my boyfriend were fooling around, and he put his penis in me only for about 15 seconds. i know there is sperm in pre cum and thats why im scared. is there a big chance i could be pregnant from that? he's not very worried.. but i am. i havent been getting as many signs for my period as i usually do.....