New claim or add to existing one?

Back in November, i filed my initial claim and was granted 60% at the end of March. They denied a couple of my claims and I was advised to get an attorney. I had a friend recommend one to me and he filed my appeal. He also filed several new claims after talking to me. That was a few weeks ago. My next C&P exam is in a few days. Since i talked to the attorney, I have seen a VA doctor who made me aware of numerous other things I can claim, sarcoidosis, hypertension, a knee injury and headaches stemming from being assaulted on baseball other service members.
My question is, should I go ahead and file these as a new claim while my other one is processing, add them to the existing one via the attorney, or wait till this one is finished and file a new one?