After circumcision

Rachel
My baby boy was circumcised when he was born. He had his 6 month check up the other day. His doctor noticed the skin "sticking" and growing again. She was able to pull one side loose on his winkie but said the other side was stuck too good and she was afraid of hurting him. She said to gradually try to work it loose after baths and to keep vaseline on it. Said she'd check again at his 9 month check up. Every time I go near it he screams at me so I haven't even tried yet. Just keeping vaseline on like she said. I was googling it and reading up on other moms who had the same problem. Some said they didn't do anything. That it corrected itselves during puberty. I just feel like a horrible mom. I keep questioning what I did wrong. I don't know what to do. Any one have the same problem?