@almula, Welcome to Connect. I am happy that you have received your liver transplant. I am a transplant recipient, and I have not had a similar experience with stomach swelling or inability to sit and relax. I can understand your worry.
My first thought is, -Have you spoken to your transplant team about this? They are the ones who can tell you what to do, and if you need to be worried.
When we have an organ transplant any unusual bodily change is something to take seriously. Don't try to self diagnose or avoid contacting them.
Almula, do you think you need immediate care? If you do, don't hesitate. With a transplant, you must be extra careful that it doesn't get serious.

Did this come on slowly, or suddenly? When was the last time you had labs drawn, or saw your doctor? (Things can go wrong between appointments)

@almula I am also a liver transplant recipient. @rosemarya gave you some good advice.
Personally, I would call my transplant team just to make sure that nothing is amiss. I would find it reassuring for them to tell me that there was no need for immediate attention.
I will be looking forward to hearing what they tell you, either now if you call them, or when you see them next month.
JK