wow, so it sounds as if you've got a couple of different things going on at once. All very confusing.

Did the ER Doctor suggest that this was a reaction to coffee?

What about the episodes in July. Did they say dystonic tics, acute dystonic reaction or dystonia?

Maybe some of the other symptoms are unrelated then.

What was the Prednisone prescribed for in the ER? Did they say?

I was under the impression that Benedryl would work really fast if it was going to work. Hopefully you'll notice some difference over the day though.

https://www.dystonia-foundation.org/...n-drug-induced

If I was you I'd not drink any more coffee or any other substances that might possibly be the cause of this type of reaction.