Extreme stress levels

Stress! I have extreme stress at the moment. Im talking high, high stress. I have my first psychologist appointment soon. But what are other ways to deal with stress levels this high? It’s caused by an ongoing problem that probably won’t be out of my life for years yet unfortunately. I can’t get rid of it, so I will have to learn how to cope. My body constantly feels Lethargic, my shoulders sit high now because I can’t relax, I have stomach issues, headaches, I’m stuttering now, can’t focus, can’t get my work done, forgetting things, always either crying or angry, my words don’t come out properly, I have psoriasis, and I’m eating junk food and piling on weight. I don’t know how I can even deal with this because the problem I have can’t go away. I’m exhausted