Help Me!!!!

I am having issues with my nipples. They hurt so bad. At first my nipples was just itchy now they hurt to the point I can't touch them. Not only my nipples hurt my breast hurt too. My cycle doesn't come in a week and some days. I don't know what is going on with the ladies. I have a lot of friends have told me that I sleep too much and they think I'm pregnant. My boyfriend and I have been arguing a lot and he also thinks I'm pregnant.   I think it's too early to take a pregnancy test. How soon can you find out your pregnant?