Negative side effects?

I have multiple health issues I’m trying to solve. Long covid with gut and nervous system issues and hyperthyroidism are the two biggest. Anyway I tried methylene blue, only 2 drops so 1mg. Two hours later I was basically having a panic attack and had a bad go with it. That was 6 days ago and I’m still feeling ill from it. My sleep went to crap and I feel like I’m stuck in fight or flight like I was when I had Covid. Before taking this I was able to calm down with propranolol but nothing calms me down now. What the? Any ideas?