Want to quit

I have liked dentistry and excelled at it in the school level. Once I started practicing since two yrs is when I started encountering all kinds of hardships. Great clinic and boss but I feel like anything can go wrong at any time. Like a broken file, failed block, Broken tooth or failed RCT All these situations are giving me anxiety and panic attacks. Like I’m unable to be in the present and ever be happy. Recently my patient I did an RCT and crown and her tooth broke twice along with the crown.her deep bite is not helping. Besides giving her the best possible clearance.She is furious and wants all her records to sue me. It’s just getting worse. I’m getting depressive thoughts. Any advice is greatly appreciated