Hi sb, Welcome to Healing Well forum, we are happy to have you join us here. I am so sorry for all you have gone through and all you are still going through. I dont have PVC's so I cant relate there but I have had a few SVT's that my pacemaker has picked up on...I just recall some really fast heart rates, this super sick feeling and it did feel as if it were a panic attack...but for me it is hard to tell them apart as I do have a panic/anxiety disorder.
Being misdiagnosed is the worst thing but now you have some validation for your symptoms. I assume that you have a Cardiologist who is following your cardiac care...and when you do find out or realize that there is something wrong with your heart it is common for us to develop or start to have anxiety over the condition. I think if you read through alot of these posts here you will find that most people do have panic and anxiety in common when it comes to heart problems. Since you have been living with this for so long and it apparently has come to disrupt your life to a great extent as you explained in your post I wonder if you have considered seeing a psychiatrist regarding this. They would be able to help with referring to counseling which is good for people with chronic health problems, and also they can prescribe an antianxiety medication that would help with some of your symptoms hopefully.
I have taken the liberty of pulling up an old thread from the forum here regarding PVC's. It is locked due to length so it cant be posted to anymore but you can go and read through it and see what others had to say regarding it. I am sure you will get more suggestions from some of our other members. Take care