Tubes tied at 19?

I will be having twins in mid september, and since I got both a boy and a girl all at once it's safe to say I won't be wanting to have anymore. I've tried multiple types of birth control in the past and they've all had negative side effects. I was wondering if I would be able to tie my tubes? I know 19 is a young age and they prefer to do it when you are older, but considering the circumstances maybe they will let me? Has anyone else had their tubes tied? And at what age?