Irritation while urine. I need to worry.

I had uti infection aroud 2 months ago.. i had fosfomycin and amoxicillin , uripas as per the gynaecologist prescription. Frequent urination is reduced and symptoms reduced. In past two months sometimes i feel irritation in urine passage and bladder.irritation is not while urinating. Its happenings when im normal. Or when i emptied my bladd / dont drink water for sometimes.Later i did urine test and urine culture test due to that irritation. Culture test results says occasionally pus cell and no significant bacteria . Normal urine test bacteria should be 0-5 but i have 8 . i still have slight pain or irritation in passage. Not while urgenti g Just after i emptied my bladder or i didnt drink water for sometime. Do i need to worry.