PVC after starting CPAP

I am 53, nonsmoker 300lbs, 6'5" tall. I had ablation for A-fib in April of 2013. I had no issues after the surgery, off all meds for the a-fib. I currently take Ramapril and Cartia XT for HBP. I started CPAP therapy 2 weeks ago. Pressure setting of 8. The first week all went well, but really did not feel any better. I still sleep 5 - 6 hours a night and feel tired and often fall asleep at the drop of a hat. My wife says I don't snore anymore since using the CPAP. 5 days ago I started having PVC's (confirmed by an EKG taken during the day) They were occurring 6 to 10 per minutes at times. (pulse was 88) This made me dizzy, tired and short of breath when I tried to walk around. Last night I did not use my CPAP, I had no PVC's that I felt today. No dizziness, no shortness of breath. The PVC's usually start within an hour of waking up and I don't usually notice them at night when sleeping. I also have a tight or heavy feeling when I take a deep breath in my upper chest, kind of the feeling of an upper respiratory infection would give you when I first wake up, it goes away after a few hours. I have no infection. Could the CPAP be causing this?

PVC's can be a serious problem. Call your cardiologist and tell them what's going on.
How do you know the symptoms are PVC's?
Do you have copies of your EKGs?