continuous cramps after period

I started my Period on teh 27th of Jan, I wasnt supposed to start til the 31st, so I guess that is normal. I started cramping 2 days before period came. That was a first for me, it usually doesnt come til right before i start. I started out spotting light pink, then it was heavy for a day, then spotting again and it was off an on for 3 days. Normally its heavy then gets lighter til it stops and i only cramp the first day. This time i cramped the whole time. Its been 2 weeks and the cramping hasnt stopped. It feels just like menstrual cramps (including pain in lower back) . I messed around with BF the day before ovulation (Jan 21st) , we didnt have intercourse but he did his business all over my vaginal area. I took pregnancy tests, all negative, a urine test at doctor's office, also neg. My breasts are also really sore (i can cleary see the veins) and have been sore off and on since I stopped spotting. I have been getting dizzy spells and nausea in the last week. It been 3 wks since I ovulated.I agree that im not pregnant, but I just want to know what is going on. I dont have an GYN or set doc because im a college student. I dont have insurance, i went to my universities student health center. the doctors there dont know whats wrong, all they tell me is im obviously not preg because I have had repeated neg preg tests, but they dont know what else it could be. Im so confused. Sorry if this is so long. I just want answers.