It's been 5 days since I’m supposed to have my period. I haven't started yet, it's been 13 days since my fiance and i have had unprotected sex. My nipples are getting puffy, darker around my                                                     Areolas  and swollen... and tender. My bra feels weird on them and i get these random pains in them. Not bad pains though. I am cramping a little on my right side (Like all of my side to my rib) and that just started today, not like period cramps though, it's the 19th of April. My feet have been crazy swollen, like it hurts to walk on them, but today they’re not that swollen today yet.  I’m having really bad back and neck pains like it sucks bad. The day after i was supposed to start my period i have this brown spotting not a lot, but just a little, i put a tampon in just in case and later when i took it out nothing was on it. I'm kind of confused. I’m having heartburn, it’s like I’ll mini puke in my mouth.. it’s pretty nasty. Last night April 12, I started having really bad sharp stomach pains on my side again I've been extremely tired too here lately; i just want to sleep all the time. I can't even clean or concentrate on my school work or anything! The certain smell of stuff makes me so sick! I’m so sleepy. Any ideas of what’s wrong with me? My fiance thinks I’m pregnant because of the symptoms. I am nauseous, headaches, backaches, swollen feet, dark and puffy Areolas, and dizziness.. I'm just confused because it hasn't been that long, it’s just been 13 days!

Any, ideas? My periods are usually irregular anyway, but I've been on birth control. I have missed a lot of birth control and haven’t been able to make it up at all, so it’s all messed up. Please let me know a.s.a.p., I took a test but my doctor said it’d be too early and it would be negative because my levels wont be high enough. Of course it said negative, should I wait longer?

And the sides of my stomach is starting to get tight?