I had the right side of my thyroid removed a couple months before I started having trouble with my potassium level. Also my sugar level went to 400. After 4 days in hospital they got my potassium's up to 3.5 and my sugar level down with insulin . My potassium level won't stay up .I have been taking (8) Pot CL Mirco ER tabs 20 MEQ a day. If I walk a couple miles or exercise any it causes my level to drop. What can cause it to keep dropping? Right now it dropped to 2.9.