Sore breasts, SEVERE cramping, No bleeding, Dizzyness, Overeating!

I haven't missed my period yet, I should be starting any day now, but for the last week or so I have been eating like a crazy women, I will eat a small snack for breakfast, then like 20 mins later I am starving again, then I eat another small snack and so on, it continues throughout the day. My breasts are KILLING me from how sore they are. I had such immense cramping lastnight I almost threw up; 6 ibprofen, and a hot heating pad would not help!! I get dizzy really quick when I squat down to pick something up, pet an animal ect, and stand up, my knees go numb and my head gets that hot-cold feeling and there are starz everywhere. Me and My Fiance make love everyday, and we have for 4 months since we decided to take it to that level, we used spermicides like twice, i let him fully ejaculate inside me everyday during my period, and at least one time during the month when i'm off my period, and we have never ever used condoms or Birth Control pills. I have been SOOO emotional, like, Ben will say something as a joke that i don't love him and I'll start balling and saying "You don't believe that do you!?!?" and he feels really bad, which is so dumb, why would I cry about a joke?? I am the biggest smart mouth around, i should be able to take it.

Come to think of it, my last period was so very light, and only lasted a few days... What are the odds I'm pregnant? LOL Sounds pretty dumb to ask. Not like I care, i'd like to be married before starting a family, but I am dumb enough to never use protection and I know being on your period means nothing, cause you can still get pregnant.

BOTTOM LINE, Are these symptoms just weird PMS stuff that I've never experienced in my life? (Never had symptoms of PMS EVER and I am 18) OR am I Pregnant? I know in the end I need to just Talk-to-a-Doc. :-P