Sheri, look at the anxiety forum. We discuss palpitations all the time over there. You may get some help from reading those.
I suffer from "missed beats" all during the day. I gave up caffeine, I don't drink or smoke. I agree with Braveheart, that you must stop those things. They will definitely aggravate the heart. I take a beta blocker which does help some with the missed beats. Try giving up the drinking and smoking. Also, try taking the Klonopin regularly and see if these things help. But only take the Klonopin as directed by your doctor.
Anxiety Disorder/Mitral Valve Prolapse
40 mg Prozac, Toprol 75 mg and occasionally Ativan