Hi Wildmare...almost sounds like you have a thyroid problem. You can have irregular heartbeat with hypothyroidism (I have had in the past) and hair loss is also a symptom, as well as, feeling generally horrible. You should talk to your Dr. about getting a thyroid test and make sure they go by .3-3 TSH for their normal levels. If they give you no help, go to an endocrinologist who specializes in thyroid problems.
Good luck with finding a cause and a cure!
I'm sorry that you have been feeling horrible and that you feel like no one is listening to you. I can remember the struggle I went through to get anyone to listen to me. Plus being 24 and in great shape, doctors kinda just push you away and say your fine. But what Ive noticed from talking to many others, is everyone seems to have this issue. The good news is that you have had alot of tests done for your heart and the results being normal is great. But that should'nt stop you from finding an answer to why you feel this way. No one should have to live life feeling horrible. In one year, I went from 3 different family doctors, to dozens of ER doctors, to 3 different cardiologists , and about 2 dozen tests and over 10 different prescriptions..(2 of them I'm still on because I cant' get off of them). But all that persistance did help. And it landed me to a EP specialist (Dr. Evan Lockwood) who has changed my life significantly even though I haven't gone for my procedure yet. I would recommend not giving up, keeping the faith in your life, and talking to people on here and listening to their stories and getting as much help and advice from everyone. Ive been on this site for almost a year now, and if It wasn't for the people on here, I probably would have went of the deepend. The real information and the right path to lead you is here, and hopefully you will end up in the hands of someone who can help you. I wish you luck, Kane
P.S> Anxiety is a big one, it does alot to your body that you would'nt have the slightest clue about. Try being on Clonazepam or Zanax to calm you down (even though both are addictive) but helpful till help arrives. Drop me a line anytime.