Yes, you can get too much potassium, but probably not from diet only. It can be dangerous, so best to get it checked. Also, do an edema check: put your finger tip right on your shin and push in hard for a count of twenty. If the "dimple" stays and is slow to fill out, you have edema and should see your doc. I just went through this as an offshoot from pneumonia and other stuff. Also make sure you are getting enough magnesium and calcium; most likely you will need supplements for those.

Much as Susan has said, my doc explained to me, the fluid was hanging down around my lower legs, ankles and feet. As soon as I was in bed, it started sloshing around causing incredibly painful charley horses with me jumping out of bed, yelling and stomping to beat the band until it would settle down. They have settled down now, finally, but you have my sympathy. Not a fun thing to have happen.

Hope this helps.