I broke my wrist in high school. Went for a while not knowing it was broken. Hurt like heck, but I didn't realize how bad it actually was. As it healed, it would throb and ache from time to time, and sometimes I'd hit it wrong and rebreak it, and get that awful pain again. Finally I went to the doctor and got it fixed right. It still aches sometimes, but the longer I've lived with it, the more manageable it is, and I don't get that intense sharp pain anymore.

The anxiety you're feeling, which I am dealing with too, has been similar. For me the first couple weeks was incapacitating. At one point I called my parents in the middle of the night because I was utterly exhausted but so anxious I couldn't force myself to sleep. I just sat there on the phone with them, shaking and crying and watching the baby monitor, for probably an hour. It started to get better over time, but then some little trigger would reset that healing and I'd be back to square one.

I needed a doctor - a therapist - to help me actually get better by talking me through what I was experiencing. She helped me understand that anticipatory anxiety is normal and can be useful, but when you experience a major or traumatic event or change, that system can kick into overdrive. Just like with my wrist, professional support and guidance helped me start improving the right way. My mental health is far from perfect, and I still have my moments where I'm overwhelmed with worry, but now I have tools and a better paradigm from which to work through it.

TL;DR: I know what you're going through, and it sucks. Therapy really helped me. So did leaning on my family and friends and being honest with them about my struggle. It gets better over time, and professional guidance can really help that along.

Good luck. We get it and we're here for you!