For potassium eat dark leafy greens , Brussel sprouts , broccoli , cauliflower and avocados . All with added salt of course . I tried supplementing with pills and low salt a alternative to table salt here and after posting some of the same symptoms you mention and help from people here I realized I was getting most of my potassium and magnesium from my food . The thing I was lacking most was salt . A cup of broth , fresh made or a boullion cube , in a cup of water are a daily staple for me now . I only take a slow release magnesium if I know I haven ' t gotten it in my foods . I also ordered a product called Endure Performance Electrolytes and add the recommended drops to my water once a day . You may need more electrolyte replacement in the first few weeks or if you work out . TLDR drink a ton of water and get more salt . It helped me with increased heart rate , lethargy , and increased blood pressure in less than a day