I am confused and upset why is she acting like this all of a sudden?

Alright she probably does not mean to upset you so you just have to understand that she forgotten or she just needs some space atm. What if you try to contact her so you will know for sure what is the real reason that she been acting strange. You had to realise that she is on court so she must be dealing alot of it this time and so she has been so worried about it. Where you had to realise that aswell. And maybe not just that to what you knew about so ask her asap.