You can catch chicken pox from shingles (not the other way round). But having had chicken pox before it's highly, highly likely that you're immune and therefore not at risk. Your midwife can do a simple blood test to check for you.
I spoke to my GP because my little girl and since little boy had chicken pox and my mum was certain I hadn't had it. My GP rang the lab to see if my booking in blood was there (was 27 weeks) as apparently they keep the blood here, they had it and checked and I was immune thankfully. My mum has since remembered that I had a jab for it along with other immunisations we were having for a move abroad.
No apparently there is an injection they can give you reddaisy, it would ahve been 6 weeks because DS didn't get his spots until 2 weeks after DD but a couple of hers took 2 weeks to scab and his were the same.