Wrong vaccination!!!

So Im 23 weeks pregnant today and went to my GP for my whooping cough vaccine tonight. 10 minutes after coming out the doctor rang me and told me they had given me the wrong injection and they had given me a shingles vaccine instead.... Now I'm worried sick that I might be ill or it will effect the baby. I have to go back to see them tomorrow at 12.30 and till then I'm going to be going out of my mind.... How do you get something so serious wrong? 😭😭😭