Rapid heartbeat (there is more than this

I start by feeling a rise in heart beat,dizzy,lightheaded,feeling of strength loss,blurred sight,multiple deep breathes,and shaky hands. also have felt chest pain,feeling of numbness that feels like a wave going from top of my legs to my feet,from my chest/high spine to feet,its rare but its reoccuring during an episode. Happens randomly and it goes up to 120BPM-140BPM + irregular beats. Decreases slowly,an hour,few hours,or 30-40 min. Had my first in 7grade,got tested with a holter,but didnt find anything. In 10th i went back,got tested,diagnosed with anxiety. I do have anxiety,but I feel different during the two events,different symptoms. Now in 12th,had some big events+many small episodes,but never tested,even now. I spend about 30-45 to even an hour in school nurse,then go to emergency room to be monitored,but they say its nothing,they just do a check up,thats it. The last time I was monitored,but it wasnt enough, no cardiologist or expert came,got told it was anxiety/emotional