I'm 17 years old and me and my boyfriend were just making out. Then he started to finger me... nothing else happened, but is it possible for me to be pregnant? I am 6 days late on my period and I have sore breasts! Please help!

Seriously no, but if you are going to play adult games then you had better do some serious research on the subject.
Babies come from sex, pure and simple

If there was semen on his finger its possible, though not likely. I don't know how regular your periods are. But I would wait another week then take a test.