Yes it's just a fear. Not an actual problem.
What you're saying makes sense. I'll try to do that. I also have a food journal so I was able to pinpoint a few culprits already (mostly foods with lactose so far). The other day my husband cooked for me and made everything from scratch but I was in bad gas pain the next day. He made potatoes with salmon, garlic, onion and tomato. Not sure what the culprit was there. ☹️
I know everything takes time especially because the surgery just happened. I'm just afraid to drop even more weight because I'm already too skinny. But maybe I need to stop focusing on that right now.