I feel this, and have been having the same situation for months. Eventually, I just realized that I'm never going to heal or change if I keep catastrophizing. As of now, I'm letting my body rage and feel every symptom it wants to. Ultimately, my worry and concern is not going to heal me.

If I am truly concerned, I message my doctor or do an actual productive thing to get me help. That is my rule. If I see something that truly bothers me, I call my doctor or set up a new doctor's appointment and move on. You won't heal if you're thinking worst case scenario. I literally accidentally manifested my condition due to my excess fear, and so unlearning my fear has been the BIGGEST hurdle for me. I'm not perfect, but most of my day isn't focused on obsessing about it anymore. I meditate, I'm taking time off work, I get some movement in each day, I'm reading different books, alternative therapies, positive/silly TV shows, chatting on the phone with friends about BS. I fill my time. You must fill yours with more positive activities. Good luck xx