Hi Sheila, I am so sorry your pup is going through all of this and I hope for a complete recovery. I think over medication is more of a common problem than people think. My daughter-in-laws two Schnauzers went in at the same time for their yearly shots after they got home one of them acted dizzy, fell to the ground, couldn't stand up so they rushed him back and they said oh he is having a reaction to the medication, so they kept him and put him on an IV, don't know what else they gave him, then later in the evening he went home, the next morning the other Schnauzer had spots all over her body, etc. so they rushed her down and they kept her and sent her home later in the day.
These dogs had never ever had reaction to the shots before and all they said was they had reactions to medications. It seemed funny to us that both dogs had the same reaction at the same time, we think they were over medicated. Hope you Pup is feeling better.
Jackie