Having spinal surgery

Hello everyone,

I have to have a bulging disk replaced. That disk is pressing on a nerve that has totally messed up from my scapula on both sides to pain and tingling in my left arm and shoulder. It is now in my right shoulder and includes my neck. The pain is awful and my left arm only has about 40% strength in it. I do strength training and even with my chronic pain and the weakness I have some very nice upper body muscle that I'm proud of.

I have my surgery May 3rd. I have to not workout for 6 weeks. I've lost 25 pounds and I'm terrified that everything I've gained as far as muscle in my legs and upper body will go away. Im also afraid of gaining weight. I need someone to tell me if my fears are legitimate or not. What can I do in order to not gain weight and not lose muscle 🤔. Thank you