This is Dr David
physicians assistants are reliable and can be experienced just as much as doctors are.
it sounds like you went to the ER to see a physician assistant in the ER.
your question is showing some anxiety and paranoia in your questions
cocaine use can cause more anxiety and paranoia.
if you continue to worry and have these symptoms, you can always see an ENT specialist doctor
who can look into your sinuses, but I bet they will find sinus inflammation
you might need a course of antibiotics for a chronic bacterial sinus infection
and you might need to be taking allergy pills and steroid sprays to prevent sinus inflammation.
if you continue to have anxiety symptoms, you might benefit from medications to help decrease anxiety symptoms.
have you ever taken medications to help decrease anxiety symptoms before?
I would not be stressed about the strychnine dust