I am in college and was given a bad drug at a party two weeks ago, I'm only 19 and I think I had my first heart palpitations that night, I couldnt breath, chest pains, my heart was beating so fast that it was hurting and dizziness. It felt like I was also having an anxiety attack. I thought that was just a one time thing from making the mistake of taking this drug, but ever since I have been getting mild symptoms throughout the day and when I am really hung over the symptoms are unbearable, it feels like im dying. I was hungover yesterday and it was so bad that I thought I thought that I was about to have a heart attack and die so I went to the emergency room- all of the test results came up perfectly normal, no drugs in my system and my x-rays looked great, the doctors almost made me feel stupid for being so worried and coming in. What is going on, or what is the most likey cause so I can prevent this aweful feeling? Ive read that this could be caused by gastrointestinal problems, which is also interesting because whenever i feel the symptoms it feels like I need to burp, which is unusual for me, so maybe it is a dietary problem. I have also heard that it could be from low potassium levels (maybe the result of my hangovers) and I have been reading that it could be from hormone imbalances (maybe the result of the plan B I had to take recently and I messed up my birthcontrol this month). What should I do?