61 year old female. rapid unexplained weight loss (over 30 lbs. over 6-8 months). 6 weeks ago UTI Tx in ER antibiotic cephalexin 500 mg 3 x day for 10 days. Stopped antibiotic after 8 days. UTI symptoms gone. Continue ill: severe stomach pain, weak seriously feel fatigue, unable to function, unable to eat due to stomach pain and mouth sores--fever blisters. General body aches and pain. Some watery BM. Can this be cancer or diabetes?