I have suffered from pain in my right side lower ribs for 3 months.  I had a CT scan of the pelvis and abdomen and nothing unusual was found.  I also had x ray of chest and back, which was negative.  Bloods are normal, including liver function. 

I still have a lot of pain and visible horizontal swelling in a long sausage shape where the pain is.

My GP is not concerned at the swelling but hadn't given it a diagnosis.  He said they would have found any sinister reason for it in the xray and or CT scan. 

I am keen to trust the science here but I feel it's odd that I don't have a diagnosis.  What, if anthing, further should I push for? 

I'm female, mid 50s. Thank you