I have read some scary stuff about people with essential tremor having cerebellum disease. my tremor is worsening. will gabapentin help?

No, maybe: Essential tremor is different from intention tremor (the tremor associated with cerebellar disease). Gabapentin is one of several medications that can help, but none of them are fantastic. Gabapentin has some of the least side effects, but traditionally Propranolol and Primidone have been 1st line - due to a perceived greater response.