Have odd sensation throughout my pelvis

I imjured my back,ended up being a piece of bone&a ligament 2x size normal was pressing on my sciatic nerve root surgery only option.Was 1.5yrs til surgery, but at same time was having so much pain,I was getting odd sensation in my pelvis. Only way I can describe is was like right before you orgasm but don't and is very unpleasant. Surgeon wasn't sure if was coming from my injury, generally the nerves for peratanium are higher. Every injection I got before surgery (lidocaine) it was gone and really haven't had much since surgery, but I've noticed it is coming back here&there,but I still have pain,maybe a year before I know if permanent. I wrote this in case anyone else has had this as it maybe something unrelated. Thanks!