I feel a lump on my right thyroid gland, what should i do

I had my partial thyroidectomy in 2015, and I wasn't placed on any medication since it was a just one of the gland that was removed. But recently I noticed a small visible growth on my right gland what should I do? 

See your doctor of course.

I agree.  Let your doctor know and he should send you for an ultrasound.