Please help me!

My boyfriend and i had sex on my cycle day 15. The condom had a hole in it so I'm not sure if i could be pregnant. I've been cramping since the whole two weeks, headaches, stomach aches, nausea, sore boobs and blah blah. Today i got a bad headache now i feel really sick! My period is suppose to be around the 3rd. Could i be pregnant or just my period but I've never felt like this. Please help in any way! Thanks