Pain In Left Side Right Under Ribs, Feels Like A

pain in left side right under ribs, feels like a ball in my side, constant ache, is not bowl ( had colonoscopy today & it was clear) pain is almost like a deep-deep bruise & affects my movements also. Have jad kidney stones before & is not same kind of pain ( also doctor checked for stones months ago when pain began). Pain is almost all the time now ( since began about 6 months ago).
WHAT should I consider looking at now? Doctor keeps making light of it but HE does not have to deal with the pain day in & out like I am