I too was on Metoprolol along with Lisinopril. Plus, Diltiazem to be used if an episode lasted more
than 15min. I had 2 lengthy episodes although those 2 meds in general seemed to work. So my cardiologist sent me over to see my EP. He suggested ablation or substituting Met & Dil for Sotalol. Monitored me with ZIO for the 1st 7 days of the new med. So far so good but it’s only been 3 weeks. I am leery of the ablation as my sister had a bad reaction to it, although everyone is different. You might need to jut increase the Metoprolol as that seemed to work for you. I was on 100mg AM and 50mg PM. Hang in there!!
Your not alone but it can be really scary 😱