First of all confirm with a neurologist that you have essential tremor. I hope it has been done before. If it's indeed an essential tremor then there is at present no cure for it. It can be controlled with medications and in refractory cases with DBS (done only in few very specialised centers in india).
Next Steps
If it's only seen during stress or anxiety then it doesn't require any medications as of now. If it interferes with activity then you'll have to visit a neurologist for evaluation and medical management.