I Have Afib And Have Had A Pacer Put In

I have Afib and have had a pacer put in , the result from that was anxiety . Then I had a heart ablation performed but I still feel like there's something going on . I get panic attacks or anxiety attacks and feel like I'm having a heart attack . I can't breath ,I have pain in my back and feel kinda dizzy for anywhere from a few minutes to an hour or two, is this just anxiety ? I drive a truck and in a lot of stressful situations . Usually happens when I'm sitting around and not doing much.