What Causes Shrinking And Numbness Of Penis After Urination?

Yesterday night, I held my pee because I was too busy about work then suddenly my penis felt tingling so i rush on the comfort room and i peed then after that, my penis feels numb and looks like it shrinked suddenly like when it s cold. two morning in a row, I have this morning erect but it was not so hard like it used to be. I can still control it but it just not the same, it feels numb and everytime i pee in the morning, it shrinks and feels numb. I haven t masturbated ever since because i m afraid that it will worsen it. I m going to a doctor tomorrow so I just want to ask if anyone here knows what this is and if it can be cured. I worry a lot because I feel like it will damage my future sex life. - I am a single 22 yo. - Unemployed - in front of the computer most of the time. - Kinda addicted to masturbating around (2x to 5x a day) - I don t find it hard to pee - pee looks normal - There s no pain whatsoever I think it s over masturbation. how can i cure this?