ZSR Stapler Circumcision. Be okay?

I had ZSR Stapler Circumcision on 15th of Apr. It's been 4 weeks around but the silicon ring hasn't fallen off and there is also swelling under the glan area. I'm bit tensed if I'm healing properly or when the ring will fall off and when it will completely be okay? There is pain and discomfort in daily erection. Doctor said only to clean and keep dry the area. For first 5 days antibiotics and pain killer was prescribed then there is no medicine not even any ointment for faster healing. Discussed with the doc but he isn't friendly, haven't checked the area properly after procedure till now and haven't guided through the right way. I'm feeling so helpless and stressed that it is affecting my professional as well as personal life.