Hello and thank you for asking HCM. I have read your symptoms and i understand your concerns. -pain in the lower abdominal part -sometimes low back pain -urinating frequently These symptoms correlate with an infection of your urinary tract or with kidney or bladder stone. If i was your doctor i would suggest an urine test to check for infection and an ultrasound of your urinary tract to check up for stones. At this moment I don t think you need any antibiotics. For the pain you can use ibiprofen. Meanwhile here are some advice to to help your urinary tract to get clean: -have plenty of liquids -fresh fruit juice,especially cranberry juice or orange juice -chamomile tea or rose tea,1 cup each day -urinate always just after having sex -don t hold your urine for long These tips help even if you don t help an infection. Thise prevent having a new infection and also help your urinary tract stay clean. Depending from the result of your urine analys and ultrasound you need to check up with your physician to take the proper treatement,eitjer for infection or stones. If you have any other question,feel free to ask me. Dr.Endri Katro