Your not a whiney pain in the butt. You are a person with anxiety that comes here to find support... like thousands of others! :) Try your hardest to stay away from Dr. Google. Our minds are very good at going to worst case scenarios and acting out future problems that are far fetched. I work for a chiropractor and you are very right, a pulled PSOAS muscle can take a while to heal! A good sign is that things are slowly improving
if it were something more severe chances are it wouldn't improve... in fact it would stay the exact same or get worse. Chiropractic doctor or Medical doctor, they always give you the worst case scenario just as a possibility.. its what they are trained to do. They just don't realize people like us take it so literal
Deep breathing and try to relax.... you are going to be fine. Best wishes