Am 33 weeks pregnant and spent yesterday with my gorgeous one year old nephew - overnight he got a bad rash and turns out he has chicken pox. My sister and I are almost certain we had it as kids but can't be 100% sure and no parents to ask. I've left message for a community midwife to call me back but should I be onto my GP to get a blood test or can they check my medical records (from the 80s?!) to see if I have had it?