DS is 4 1/2 and gets occasional right hand flank pain when urinating. It is always last thing at night and always followed by him wanting to go straight to bed and feeling too 'sad' for a story so not a get out of bed ploy. He gets the pain as he starts to urinate and then doubles up on the floor. I then lift him on to the toilet and cuddle my sobbing ds while he finishes going to the toilet. It probably happens twice a week and was initially on a day when he hadn't had much to drink, but since noticing that I've started to make sure that he drinks more and it's still happening.
After the last episode I took him to the Drs with a sample and after a prod and a dip the dr said all seems ok and it'll probably pass. I mentioned that I was concerned because he'd had to have a kidney scan after birth because he'd only had 2 vessels in his umbilical cord and the scan had shown that his right kidney was small but just in normal range. Dr pulled the notes and they said that he'd had to have the scan because his 20 week scan showed serious kidney abnormalities (I think I would have remembered that) and that his post natal scan had shown an enlarged left kidney and nothing else.
So, now I'm left with a lot of questions. The dr has advised me to ignore it and it'll pass but I can't. Where should I go from here?