I really dont have an answer for you but I just wanted you to know that you are not alone. I have 3 different heart arrhythmias diagnosed when I was 21. I was obsessed with them for a little over a year after I started getting them which let me to develop health anxiety, anxiety and panic attacks. That and the fact almost every dr I saw told me it was anxiety. I eventually found a good cardio who listened to me and did a bunh of tesing. I am 35 now, I still get them but I do my best to ignore them for the most part and believe it or not it actually works. The more you pay attention to them the more they happen for some reason. If I get a bad bout I eat a banana and take some mag... It helps, for me anyways but the best thing I found that works is distraction and ignoring.
I am going through some crazy things myself, I think I passed out 3 nights ago while I was laying on the couch. I dont remember anything and when I came to 20 or 30 mins later my brain was really fuzzy, I was confused, very unsteady could barley walk straight and just felt very strange all together. It scared me so bad, im still scared. Been looking all over for answers but can find none. I do rarley get a brief dizzy feeling kinda like someone shook my head really fast but it passes as fast as it starts and I did get that feeling earlier that day or the day before so I don't know. I been feeling weird ever since that night and wish I could remember something. I have never passed out before. I know we don't normally remember the exact moment we fall asleep but we remember things before it. I remember nothing, last thing I recall is my husband said he was going to bed and I said I would be there in a few mins and thats it. I did go to the ER but they did nothing but a ct scan of my head even though I told them I didnt need it. No blood no EKG nothing.
So anyways, I just wanted to let you know you weren't alone. I have had NSVT caught on a holter monitor before but I don't recall how many seconds it lasted and I don't recall if I felt it or not. I have also had couplets and three in a row caught as well as single PVCS, PACS and SVTS. I do mostly feel all the PVCS. The one that turned out to be the 3 in a row felt like a bunch of flutters and it took my breath away.
Its a good thing your gonna get the event monitor. Its how most of mine were caught but my dr told me that since my echo showed I had a healthy heart the arrythmias werent gonna kill me. Good luck and I will pray for you.