Trying to keep smiling is a way to calm yourself but that only might work at that moment. It didn't work if it came to those people laughing at your face.

I wonder how you feel now? Do you still feel down and can you manage? Did they contact you and apologise and inform if you arrived back home safely?

If these are relatives of your grandparents and parents this is your family too. So no sister, you are not wrong.

It's good to hear that steemchiller can help you out and you can help him too. Still, I do believe that you will one day tell them straight into their face how they treated you. Not today, since you will not be strong enough but remember that if you always smile, they will never stop till you set your boundaries.

I believe you do more than your best. Don't forget to relax as well.
Do you have a hobby, something you like to do or to create to ventilate?

Take good care of yourself. I will stop by again.
Sweet dreams and a happy new day.
Be blessed.