I Was Prescribed Prednisone 20mg Tablets On 12/06/16 -and To

I was prescribed prednisone 20mg tablets on 12/06/16 -and to take 3 tablets daily it made me sick I tried to drink water with the pill, I tried food taken with the pill and I tried milk taken with the pill - I only took 3 tablets the first day and 2 tablets the second day I have not been able to eat solid foods since 12/05 and I am concerned about this - all I can manage to eat is jello and drink gaterade and if I drink water it goes straight thru me and I have no bladder control which I didn't have this problem before taking this medicine