Well done. Sorry you didn't get any replies when you first asked - I won't be the only one looked at your post, and hesitated what to say. Sometimes the person on the spot just has to go with their gut - and you did, and you did well

Whilst it's generally true to try not to intervene too fast, frankly you won't kill a lamb or a ewe by helping them out, (provided you stop and/or call a vet if you can't sort it with gentle, easy movements) but you can get a dead lamb - or more than one - by not helping when needed. And as you get more experienced, you'll develop a better feel for when you need to help and when you can wait a while longer.
You clearly have a good instinct - trust it
