What Causes Bloating Feeling, Dehydration, Low Potassium, Salt And Magnesium Levels?

Is this free? About 4pm two days ago, I was on my iPad, things started getting weird. I felt like I was loaded. But thought, couldn't be, didn't eat or smoke anything. Well, kept getting more intense, told my husband how I was feeling, he rushed me to the er. C scan was fine. They said I was dehydrated, plus potassium was very low, magnesium was low, and salt level was low. They gave me an I've with necessary fluids, a relaxer (decided to throw in a good case of anxiety on top of it.) I rally thought I was dying., hard to function, hard to walk. Felt like I was fading. I do have an appt with my dr who is alo an internist next week. Just wondered what you thought about this.?????? Thx I am female 60 yrs old