Varying Palpitations With Dizziness And Light Headed. Blood Work Is Very Normal, Great Cholesterol And Increase Sodium. Is It Anxiety?

Question: I have had minor hear palpitations in the past - sent to a cardiologist 4 yrs ago the day after my father died of a heart attack because of them but everything showed ok - told to watch but increase sodium. I am 39yrs old, 120lbs, healthy eater, great cholesterol (or so I am told), blood work is very normal as of a full blood screening a month ago. Run and own a successful taekwondo school with my husband.

My palpitations are varying: my heart beat stops for a few seconds and then starts up; My heart will speed up for a few seconds and then go back to normal. Light headed, dizzy and tight chested. Then I feel like my heart beat really slows down but when I check it, it's pretty normal for me (between 60-65 beats a minute resting, blood pressure normally around 119 / 70). This has been a regular occurrence on the past but the past few weeks have gotten worse - more often. The past few days, even more often (3 times today already) and seem to last longer - enough time for me to check it and actually feel the hear beat difference. (before by the time I checked my pulse, the palpitations / stopped beats had passed)

Is this anxiety? I've battled that for years but have pretty good control on it and am not overly stressed out right now, and it doesn't really feel the same but kind of does, if that makes sense.

I also feel like I have to have a bowel movement but can't - bowels aren't having spasms of any kind as far as I can tell.

Thanks in advance for your help.