Wpw syndrome advice please?

I'm a 22 year old female who has been havin svt attacks from the age of 10 after having battles with my gp I was finally sent for a 48 hour ecg after many years of being fobbed off being told I'm having panic attacks! Anyway my ecg found out I have wpw my heart often races at 260bpm during my svts and as I'm asthmatic I'm not allowed beta blockers I've been put on the waitin list for an ablation and I'm currently waiting to hear from the hospital about when I can have my procedure since stopping caffiene I'm not having as many I can go months without having one then all of a sudden have a few a week mostly they are brought on by bending quickly or if I inhale sharply or sneeze /cough the problem is I'm constalnly worried about this killing me as I have a toddler and can't bare the thought of dying and leaving him it causes me to have panic attacks and I'm constantly worried doctors have told me that as its not killed me already its unlikley it will but that unsurprisingly doesn't help please anybody who has this or knows somebody who does give me some advice I m tired of living like this also does exercise help thanks