Even after surgery you must be having 3 urinary frequency at night. Google prostate massage. You will find 4 types of massage. One massage which is called anal peripheral prostate massage. please study it and if you find it suitable to you , you may consider doing it after consulting your surgeosn.
talk to doc should have given u small doses of viag to get goin my dad had that surgery and i know he was havin trouble give it some time and dont get to nervous is my answer