Ongoing, undiagnosed chest pain: I want to feel better

Hi! I am posting in the hopes of finding some answers or possible routes for me to explore after 7+ months of undiagnosed chest pains. I am a 25 year old female. In September of 2020 I woke up in the middle of the night with a sharp chest pain, nausea, and dizziness. Prior to that I had been experiencing premature ventricular contractions (PVCs) (did not know that is what they were at the time) sporadically, but after the night in September they started really picking up frequency. I ended up in the ER twice in one week with chest pains and excessive PVCs and left with no diagnosis each time. Since then I have experienced an array of symptoms including: continued chest pains, arm pain, numbness in hands and sometimes face, back and neck pain, fatigue, dizziness, head pressure, the list goes on. I have gotten just about every test done on my heart that I could - echocardiogram, Heart MRI, Holter monitor, stress test - all of which have come back totally normal. I've also explored neurology and got an EMG of my arms and hands as well as a brain and cervical spine MRI - again, all totally normal. I've also had bloodwork done throughout all of this, everything always comes back normal. The problem is, I feel terrible. Almost every single day I experience chest pain that often feels like pressure or squeezing and can be sharp. I've gone onto Nadolol (beta blocker) which has helped minimize my PVCs but has not eliminated them, and they can sometimes be debilitating. Every doctor I've seen (and I've now seen many in search of second opinions) just says because I'm young they don't think I have anything to worry about, which is extremely frustrating when each and every day I am in pain. Sometimes, I have episodes that are so serious I've been close to or gone back into the ER. Even as recently as a few days ago, I woke up in the middle of the night and felt pressure in my chest and then suddenly felt as if my blood was running ice cold and I was extremely faint. While getting ready to go to the ER, I had to lay down before I passed out and slowly started feeling better, so did not go in. I am living my life in constant fear of the worst happening, and am searching for next steps to explore to try to find some answers. Has anyone had a similar experience or any suggestions of where to go next? Any thoughts or help is so appreciated... I want to feel better!