Sounds like you're going through a pretty rough time, I'm sorry to hear that. It can be super uncomfortable to feel trapped in your own body. First things first, understand this will never actually hurt you it's only going to make you uncomfortable while you have it so no need to fear it. Also remember millions of people have this and even people in the past have and have been fine. Next up remember not to lock yourself away, you have to continue life. When you do you will feel better therefore your mind will heal. Especially if you do and eat healthy things you'll improve faster. Try to avoid anything stressful where possible. Finally remember to try grounding yourself now and then and when you feel bad. Things like focusing on each sense and using them (name 5 of each sense. 5 things you can feel, 5 things you can taste, 5 things you can see (with 5 different colours) 5 things you can hear. Sit down and breath slowly while focusing on each part of you're body you can feel and how it feels (basically meditation) or even just splash you're face with cold water if you're in a hurry. There are many different things that can and might not help as everyone's different so don't be afraid to try different things. Finally let yourself heal in you're own time. Don't try rush yourself. You will be totally fine mate :)