1. Vtach is always a possibility. But actually not necessarily dangerous. PVC patterns also possible as you mentioned. It’s very difficult to quantify what sort of heart rhythm issue you’re having by a pulse or a sensation. You can have just 1 single PVC and FEEL like you just had 4 or 5.
2. What you were doing when you had symptoms in as much detail as possible, family history of sudden cardiac death or heart disease (if any), any history of fainting spells or dizziness, gender, age and a description of specific times of the day or month (if related to period) in which you experience symptoms. Any other triggers etc. all needed information to give an opinion.
3. As I said earlier, not all VT is life threatening. In fact only a minority of VT is hemodynamically unstable and fatal. So if that’s your “worst case” scenario bear this in mind. It is not necessarily VT to begin with and even if it is, it’s not necessarily life threatening VT. I think you got good odds of not experiencing sudden death based on the limited information offered so far.