HELP!

Okay so let me start first off by saying I'm totally probably being paranoid but just wanted some feedback from ladies that are expirenced. I'm suppose to start my period the 10th of this month meaning 4/10. For the past 2 weeks, I have felt so queasy feeling like stomach cramps, random pelvic pains, awful back aches, very gassy, & my boobs.....ugh my boobs have been so sore. Iv been sleeping a lot more then usual, the other day I slept until 1 o'clock on my day off. if I don't eat in the morning I feel sick to my stomach but it's like I have no appetite, and don't want to eat. Either way I still feel sick. I am a smoker, and in the mornings the taste and smell of a cigarette makes my stomach turn. I'd love to know if maybe you ladies think it's just stress or my period coming or a possible pregnancy?