Agree with posters that you will be fine and this is not going to make them sack you.
I would, however, strongly recommend that you join a Union for any future advice,( particularly as you are in your 50s and no doubt thinking about retirement provision). They are the experts and will have dealt with every sort of work place problem. A problem shared is a problem halved. They will have your back.
Unison, I believe, is the union for people like you in public services, schools, voluntary sector etc. Do you know if people you work with are in this union or maybe another, Unite possibly.?
Ring them today 0800 0857 857 or join on line unison.org.uk. The monthly subscription is on a sliding scale according to how much you earn so eg £20,001- £25,000 £14 pm, £25,001-£30,000 £17.25 pm. ( This incudes all sorts of members benefits ( financial support for learning, legal services, pension advice, discounts etc .)
If at any time in the future you need a 'friend' to attend a hearing with you or you have a problem at work or need advice they will be there for you. They are very used to mediating between people.