Hi.
People make career changes all the time.. and not just once.
It's exhausting to have to keep doing something difficult for an extended period. It really wears you down, so don't feel badly about that.

Is it possible for you to take a break? There is nothing wrong with taking some time for yourself to think. School will still be there when you get back.
And don't let other people pressure you, they have no right to, really.