Balanoposthitis with phimosis. Impcated!

I am diabetic since 3 yrs and since one year I was using regular medicine such a dapefy  which never caused any issue but recently I had blood check up done and my HBA1C was 7.9 and the same doctor has prescribed me SITARA DM 1000mg but as I started taking the medicine within a week I started developing a lot of itching and discomfort in penis,also some white discharge I was getting and my foreskin became very tight. When I try to pull back it doesn't retract and will pain .Doctor has told me to stop using the tablet and changed to tab  gemer sita and anti biotic for infection in penis. I have got minor relief but still the tight foreskin issue is still there and I can see the white kind of thing. I consulted urologist and dr has told me that I need to have a circumssion+frenulopasty to be done after examining me. I am feeling worried because I don't want to get a surgery just because of side affect of drug. I never had any kind of issues in penis in my life and now sexlife is impcated