Hi jenlyn,
i just want to add be patient the nausea should go away as your body becomes used to the Carbidopa-Levodopa, if it doesn't then you may have to take a diffrent route. Right now, the only "test" for Parkinson's or Parkinsonism
is to see if you respond to the Carbidopa-Levodopa and by the way it sounds you are responding to it. Also, do make an appointment with a Movement Disorder Specialist. The difference here is like having heart surgery by a specialist or some kid down the block. Movement Disorder Specialist sees the disease everyday where your primary care doctor or local neurologist might see it once or twice year.

Good Luck and keep us posted

GregD