I was recently rush to the ER by ambulance from the Urgent Care because of an abnormal EKG. My potassium level was 2.0, which is very low the ER tells me. I am concerned as to why it got so low in the first place, and will it return to that level after time. I was given a IV bag of potassium, but am concerned. I have a Dr appt on Wednesday, and will ask to have another blood test. Has anyone ever experienced this. I have read about everything that could cause it to be this low, but none apply to me.