Thank you everyone ❤ She's not the first pig I've had PTS, but it was the first time I've actually been present at the moment because I never thought I'd cope well... and I reacted really badly. Started blacking out; came round, but then was overcome by nausea; I was on the floor of the vets for a good half hour. Luckily my mum was there to take over with discussing cremation details, but I was so embarrassed and ashamed.
So what happened didn't really sink in until a few hours later. I'm just glad she isn't hurting anymore and I hope she knew I was nearby.