>I have to learn how to accept my limitations.

Exactly. We all have them. Even great achievers often have nasty personal faults, but they probably don't dwell on them. Try to give yourself a break. I find meditation helps with anxiety. Also, breathe! And meditation is often all about breathing, so that is part of why it helps. It's relaxing. Precisely what you may need. I used to have anxiety that people called panic attacks, so it is curable over time. People always said to me, "Don't be so hard on yourself." So, I pass that on to you in hopes that it can be something to focus on instead of worrying you're not good enough.