Pregnant or PMS? Please help!

I had protected sex with a condom on February 2nd, and it didn't break or anything like that. I'm not on any form of birth control (except condom). According to eve, my period is late by 2 days, I don't know if I've just stressed myself out so much thinking I'm pregnant or what. My breasts became sore about a week ago (like they always do around my period) and I've had a few cramps here and there but no period. I haven't been nauseous or had any food cravings at all. I'm freaking out because I just cannot be pregnant right now, I've got schooling and everything ahead of me that I have to focus on. So, am I just over-reacting and stressing myself out or does this sound like  a pregnancy?