I'm sorry, but I see that you've worn monitors before. If nothing occurred during those periods, a 30 day monitor will give you a better chance. Some patients have them placed under the skin and wear them for months in order to catch a rare event. But I think that may be more for dangerous arrhythmias.
Until I knew what I had, I figured that after a couple of times this happened and I didn't die, then it wasn't dangerous...... and it wasn't. So relax! You're most likely experiencing premature beats PVC or PAC in nature, and perhaps brief runs of SVT (look these terms up). Neither are dangerous, and in the case of PVC's nothing is usually done until the numbers reach into ten thousand per day or more. That's not to say that you shouldn't confirm what you have with a physician. But I wouldn't be rushing to call an ambulance when these occur.
There are monitors you can wear for a day up to a month that will record these events, and allow a physician to literally see the electrical activity within your heart. Once they see what's going on, they can start a plan of treatment.
PVC's are perhaps the most widely discussed topic on this forum and just reviewing a couple of pages of posts will give you and evening's reading.
So until you can see a professional (and I heartily recommend that), relax. They feel strange, but in most cases are benign.