More than one thing:
- Muscle growth is a slow process. Eating excessive amounts does not accelerate the process.
- Keep an eye on your waist. Did it increase because you added 100 lb to your squat and deadlift? Or did you just eat too much?
- Of all the lifting disciplines, bodybuilding workouts are the least thought out. Spend some time becoming knowledgeable on powerlifting, olympic lifting, and strongman to see the importance of smart volume and the central nervous system. Then use that knowledge to better program your workouts.
- To the point above, it will allow you to understand progressive overload better and the way to incorporate it best for your own body type. We are not all built the same. Bodybuilders think in absolutes. When they hear the word volume they think of a guy using 135 on every exercise and hope the accumulation of endless sets will result in progress. Or they do 20 sets and try to do all of them to failure. Neither approach works. Well-rounded periodization and understanding volume can result in great progress. Dan Green, Ben Pollack, Andy Huang, Steve Gentili, and Dimitriy Klokov aren't bodybuilders (Ben is now), but carry a lot of muscle mass.
- Whichever training style you choose, assess how it affects your life. If you can train high intensity like Dorian or JP and an hour after your workout carry on as normal and sleep unassisted at night, then you can probably handle it. If not, try another approach. Trial and error and learning is part of what makes this all enjoyable.