you're just going to have to wait and test.
like annie said anytime the penis and vagina are in contact (whether there is penetration or not) pregnancy is possibility.
Anytime a penis rubs on a vagina, pregnancy is possible (but not guaranteed). He would have had to have sperm on his penis, and you would have to be at the right point in your cycle to have a ready egg. Breasts can also hurt for other reasons, growth being one and hormones being another and even caffeine being another. I think you're going to have to wait and test in 2 weeks. Sorry you're going through this scare.