Laura, I just knew when I started reading your post that it was going to turn out to be a drug reaction. So sorry it happened to you!
Suzie, I had an awful reaction to Compazine as well. Had to be hospitalized when first pregnant decades ago, now. Couldn't keep anything down and they hooked me up to IV. Kept throwing up and they gave me Compazine. My head drew all the way back and I could not move it. I could not close my eyes. Finally they gave me something that relaxed it and me and told me to never let anyone give me that again.
Many years later, I was nauseated and vomiting to the point that my daughter took me to the emergency room. I told them, as I always do any doctor, nurse, whatever to red flag it in my file. I cannot take Compazine it causes severe motor reactions. They gave me a shot. After I got home, My neck drew back again and same thing all over again. When my daughter called the hospital, they told her I was psychotic, that could not happen. The admitted giving me Compazine and it was noted on the sheet that I brought home. The next day me daughter took me back to the hospital. My eyes were so dry, even though they had been keep wet cloths across my eyes. The doctor that time treated me like dirt. Wrote down that I was psychotic and gave me a shot. Shot did nothing. My daughter looked at the sheet and saw that the injection itself cost $1.00. Figured it was water. The bill of course was $100.--1982. Anyway later, I told my daughter that a lady I worked with took valium. She called the lady and asked if she could spare a couple. She did. After the second dose, it relaxed and began to come around again.
A few days later I talked to my druggist and he said that it was quite common--these horrible reactions to Compazine. He said that in some cases it was permanent. (Shudder!) Looked it up in a PDR and there werer SEVERAL PAGES of side effects for Compazine.
I cannot take any of the newer drugs.
By the way, I refused to pay that emergency room bill. I went down and talked to one of the nuns and explained why. She got it removed for a while and then it showed up in collections. I did not ever pay it though.