Please help me out. I bought iPhone 14 midnight that is sealed two weeks ago from a retail store. It's all fine, no replaced parts, battery health 100%, and it's also under Apple's warranty. A few days ago, I started having a feeling that the phone's back's a little bit bumpy or thick. Sometimes, the feeling's gone and something it came back. I feel the bumpy feeling or thickness sometimes on the right side, sometimes on the left. I suddenly thought that might be the cause of swollen battery but no symptoms like screen lifting or back bulging is happening. Just the feeling. Can that be just an psycho feeling or worries or is the battery actually faulty and swollen? When I took the cover off and tried putting the phone on a flat surface, it stays flat. Please give me some advices since I am worried that the screen would come off and crack.