Pregnant or not pregnant

I feel it is too soon to test but the thought is driving me crazy.. my boyfriend and I had unprotected sex a few times about 2 weeks ago. I had missed my pill multiple times and we didn't use any other form of protection, not even withdrawal. I kind of got my period.. it was really bright and was shorter than usual. Lately I have been unbelievably exhausted, tender breasts and extremely nautious. I figured if i am pregnant it would be normal to get this period like i kind of did and miss the next one since it would only be 2 weeks since conception. Do you think It's a good chance I'm pregnant?