I'm kind of out of the loop too..I'm not sick, but my 'puter is! What meds are causing this? Are you keeping your blood sugar up? IF I forget to eat, I get the bad rattles.
That sounds a bit scary. I can understand your concern. If it continues please go and get this checked with your doctor. It's better to know that truth than to worry about "what might be". Trust me on that!
I have the essential tremor too and take a beta blocker for that. Please do talk to your physician if you having issues with your medications as your physician is your best advocate for helping you adjust your meds.
Take care.........................gentle hugs