"X-ray department"

I was called into the X-ray department on short notice for an MRI scan. When I got there I was told I would have to drink nearly a litre if drink which contained a dye. I tried drinking but as I've been sick for nearly a month I couldnt keep any down. After an hour a nurse came out and in full view of othe people shouted that I was being stupid. Then the nurse said that I was to have an injection of dye to which I told them I couldn't have one as my veins had collapsed from giving blood the previous day and again the nurse talked to me like I was stupid. At that point I walked out as this was getting very upsetting.