Suggest Treatment For Abdominal Pain & Nausea

24 yr old female been having bad lower abdominal pain and lower back pain. Along with diereha, headaches, nausea and vomiting, sides hurting , fatigue, feels like there s a knot above my belly button, having to pee more then usually, stuff that Normally doesn t bug me does now like smells and stuff I see like blood and that short a things, I m wanting food combos I normally don t eat, I have chills and then I have times where I m hot or I m freezing and outside is the opposite of how I feel and my period has changed and I have had 2 periods in the past 2 months and that s abnormal for me. I ve been to my doc for 3 weeks now she s giving me medicine for Wat she thought it was but that hasn t helpd none n she won t give me nothing else and every test she s done has showd up neg and I had an ultrasound done but she doesn t knw wats wrong and makes me feel as if I don t knw my body and that there s something going on cuz i feel different and my main concern was am I pregnant cuz I ve got majority of the signs n the same thing happened before I found out I was with my daughter but I ve been told my hormones are to lower to show up on test till I m bout 3 months but it s either that or the ovarian cyts is back but in pain and can t figure out wats wrong.can u help