In October this year I went trick or treating with my daughter I couldn't breath well so I ended up in the er. I had anemia also low potassium so they gave me some potassium also anemia pills. I went home feeling ok but the next day I was filled with nerves felt like I needed to run or something I couldn't catch my breath it was overwhelming. I can't stop feeling sick every day don't go any where now and fear I can't breath my brain feels I don't get enough oxygen to my brain. My family thinks I am crazy to shake it off. I been to the er four times and everything is fine please let me know how to get better so scary.