Painful fingering

That means you were about to squirt :)

oh my god if a boy was fingering me for that long id smack his hand away. youre probably sore from all that! obv he didnt really know what he was doing... 

Ok, no matter what, if you feel pain while doing sexual things, say so. I've had a similar experience, and honestly, it's not because anything's wrong with you or your body, it's most likely because whatever the guy is doing just isn't pleasurable. Also, it could be that his finger wasn't lubed up at all - and even though your body produces its own lubrication, buying relatively high-quality stuff  for your partner to use on their finger can get rid of the problem because the less dry that surfaces are, the less friction there is, and the less pain there is.