4 DPO and dying

I'm 4 DPO and just cannot handle myself right now. Since ovulation, my boobs have been so sore and I have had crampy weird pains in my ovaries/uterus/lower abdomen kinda surrounding my pelvic bone, now my head is hurting. OBVIOUSLY it is not pregnancy as its way too early for implantation and it's been going on since O-day. What could be going on? It's my first time actually ovulating since July. Could this just be a progesterone increase? HELP!