Pregnant after Dry humping?

i have a very embarrasing but truthful question:

i was at my boyfriends house and first he fingered me but then after i ended up dry humping him but we were both fully clothed, i took my shirt off and that was it. we did that about 3 times but never actually ended up taking off any more clothing. each time when he came he puled me off of him but after the third time the bottom of his shirt and top of his pants was soaked, it didnt appear i had any on my jeans or anything and never once did he take off his pants or anything and he fingered me before we did anything else.. my girlfriends all were joking about the fact that i might be preganant and how i could get pregnant from that and it got me really worried like what if i was? now all the sudden i keep noticing things about myself that have changed like how my period was late and how my breasts seemed sore, ive heard of like mental pregnancies from the suggestion of the mind so is it possible i really got pregnant or is it just my mind playing tricks on my body?