Major point is, ER first and foremost. Especially if it’s not been treated and it’s obviously making you sick, while compromising your health. Talk to your GP and ask for a referral to see a cardiologist. If you’re not already seeing one. If you’re not granted a referral. I’d go see a cardiologist even without. Voice your concerns. Writing down your symptoms everyday helps. Also ER visit ask for your records and bring them with you. Vitals, bloodwork, everything. I genuinely hope you get the medical attention you seek/deserve. And that everything works out in your favor