Real bad bladder pain but no infection & is worse during & after avbowel movement, what could this be can hardly walk at times?

Here are some... What you've felt suggests some irritation to local nerves, tissues, or organs by some sorts of inflammatory or physical factors. To sort the suspected things out correctly has not to be difficult by following instructions in; thereby, you gain insight on how to work with Doc closely so to reach right Dx for right Rx, care, & counseling.