<s>[INST] I have just come home from a brief hospital stay where I was catherirized and have since been experiencing lower abdominal pain an lower back pain, i had a urinalysis that was negative but my stomach is bloated an the pain is constant, there is no fever but i am serioulsy uncomfortable. [/INST] we need to investigate for renal infection.I suggest consulting the treating doctor and running routine blood investigations will make picture clear.Regards </s>