Hi @MissK, 
Welcome back to the forum.
I’m sure you’ll hear from some of our members soon as what you’re experiencing is not uncommon. Many of our members have spoken the side effects of Sinemet before, here’s a thread that you may want to look at here: Sinemet Effect.
I’d also recommend you speak your GP or Parkinson’s nurse so that they can review your medication.
Best wishes,
Reah