22 m. frequent, urgent urination, fatigue, thirst, ab + pelvic pain, weight loss of 10lbs in three weeks. no uti, blood glucose ok. help please, thanks.

Cannot diagnose: You need to be seen and examined and tested by a good clinician, either an experienced pcp (family practice or general internist) or an endocrinologist would be a good place to start. Bring a full detailed history of your symptoms and their timing and associations with you and be patient. The evaluation may take some time. Best wishes for a successful outcome.