Starting ivf tomorrow

I am starting IVF tomorrow. Starting with estrace for a week then will start injections a week or so later. I am 37 years old with low AMH and high FSH and endometriosis. I also suffer from pretty bad anxiety mostly health related anxiety. I am so nervous. I am afraid I am going to feel really sick or out of control or make my emotions so bad that I start having panic attacks. I don’t know if I can handle it but I am forcing myself to do this and be an adult. I’m afraid also of gaining a lot of weight. Anyone have any words of encouragement? Am I going to feel horrible and lose my mind?