Is it normal that i zone out and not sure if this is related to..?

Well over past 5 months I have been through really bad anxiety. It has calmed down a lot now as I don't get panic attacks but I am confused if whether or not the following is still anxiety that remains- Quite often I zone out and think oh no please heart don't race or il pause to check to see if my heart is racing or not.Every time I zone out my heart races BUT I am not freaking out like I used to and I don't feel that awful overwhelming dread just a little bit of fear of my heart racing. It is weird because it's like my brain creates it when ever I zone out. My tummy also feels tight and sore over the left side and just under ribcage...Is this anxiety or what? I am a little confused