thank you for your posts.
Panic attacks and anxiety are what is not normal. That is likely your health issue, not heart. Almost always there is a biochemical reason for them, and they can be treated.
I think your energy needs to be directed toward seeing a psychiatrist to evaluate and recommend treatment for you if indicated. These things tend to be lifelong and quite paralyizing, untreated. Although good psychologists can be helpful, they are not medical doctors. I believe anxiety/panic attacks should be treated medically and with behavioral therapy. Psychologists have a role with behavioral therapy, however.
Overreacting? Probably, but when you talk about PVCs we have all been there. They are scary to feel no matter what we are told. You are cardiac conscious. I became that way at 17. Some people feel every little thing. Since your doc says your heart is fine, try not to let any of these "skips" bother you. You will, but try not to. Come here when you are feeling bad. It always helps.