Hello and thank you for asking HCM. I read all your symptoms and i understand your concerns. During my practice in our clinic, we have a lot of patients with a part of your symptoms : Passing frequent, small amounts of urine. Pelvic discomfort. A feeling of pressure in the lower abdomen, or even the pain that you feel in your back. Usually we find these symptoms in patients with urinary tract infections (UTI), in infection of the bladder (cystitis) and can be treated easily. If i were your personal doctor i would start you on antibiotics and do a urine culture to confirm the diagnosis. I don t think that UTI and the fact of being hungry has any correlation. I suggest you drink a lot of fluids, and ad some natural antiseptic like these kind of tea that i am going to write,because it will help you clean your bladder and all your urinary tract. -Peppermint-ginger-juniper berry tea -Chamomile tea -Marshmallow Root Tea These kind of tea,can be used without any problem.Since are natural,they do not harm your body. Feel free to contact me for any other questions. Wish you good health. Dr.Endri Katro