I don’t think it was a Tim burton movie, but it had that creepy kinda feel.

it was animated and I only remember a few details but I’m pretty sure it’s a teenage girl and her father. The girl wakes up with stomach pain and her dad drives her to a hospital then she went on, like, adventures? With ghosts or something undead? And then in the end it’s revealed she had a apendicitis and it was all just a dream but it was hinted that it wasn’t?

anyone have any idea what this movie might be? I’ve been looking forever but can’t find anything