Suggest Treatment For A Mild Angina

Past hx dx of MVP through ECG's, TEE & EKG's. No meds taken.
On Thurs, I walked up our driveway, which is about 10ft long & on a slight incline, my heart began to skip beats. It did this several times. Each episode lasting 2-3 seconds & SOB was experienced. I became lightheaded w/ each palpation. I sat down for 20 min. My b/p was 100/79 with a HR of 85. 30 min later, I was still having palpations, my b/p was 90/72 with HR of 90. 30 min later, fingers began to tingle, & lips became pale. My bp was 80/60 with 100bpm HR. I made my way to the ER.
At the ER, SPO2 was 95, so 3L of O2 was given. I experienced another palpation, which set off alarms at the nurses station. It was a PVC that lasted 3-4 seconds. The nurse explained I experienced V-tach & I was admitted to the hospital. While there, I had continuous O2 for SOB & EKG's around the clock, as well as cardiac panels. My EKG's revealed inverted T-waves. I had a cardiac MRI which revealed no blockages. I also had a stress test. My resting HR was 72. Less than 1 minute after beginning the stress test, my HR soared to 135. 3 minutes into the test, I had a 3-4 second PVC. I endured the stress test for a total of 7 minutes, reaching my goal HR of 165bpm. I had to lay down after the test to get my HR to come back down. It stayed around 120bpm for 20 minutes. I then had another MRI, which revealed nothing new.
ECG was done & the cardiologist said I don’t have MVP & I am to a tilt-table test for further information. I also had a thyroid test, which revealed a normal thyroid. Cardiac panels came back normal & imbalances were detected. I spent 3 days in the hospital, with absolutely no news or medications. My last night in the hospital, I experienced a hotflash with sweaty palms. My eyes became bloodshot & I experienced mild angina. I was given a Xanex & told to sleep.
I am in the dark as to what is wrong with me & would love insight as to what COULD be causing this to occur.