Hello, I am Rafael. Thanks for asking your question - I'm here to support you. (Information posted here is not private or confidential but public).
I am sorry to know about this shocking situation. It seems you were not expecting it at all but it happened.
Always the best, XXXXX XXXXX approach is not to guess about what would be the best, XXXXX XXXXX actually talk and get clear about your-her core boundaries and expectations, so you both could respect and support each other.
I would suggest you to send an email message saying hello, showing you care about her and asking her to tell you what would be fine for her about keeping in touch with you. Then once you know that, you would decide how much or not you want to keep communication with her or not, depending on your feelings, expectations and what you truly want to afford here. There would be no misunderstanding or assumptions that get wrong since you both will know what to expect.
the way she choose to end it was not the best one, since as you said, everything seemed going fine, and suddenly without further explanation -honesty, she ended it the way she she did.
Then I think 1 week is a good period for you to establish contact and ask her about it and see what she says, if keeps not being totally open, direct and honest with you or if she chooses to be truthful and discuss with you what has been going on. From her response or reaction you would better know what you would need to do in order to take good care of yourself and how to cope with this scenario.
If she keeps this no communication approach for more weeks then it would be clear she used this plan as a way not to face the shock of ending it in a direct way.
She has been avoidant, not totally honest and open towards you, has been hiding what she truly feels and wants, and then decided to withdraw instead of working on clarifying things to see if you could continue , make adjustments or just end it.
I think you could sen her an email message asking her to let you know what would be a good - acceptable frequency and ways of communicating with each other or if she just wants no contact at all until she decided what she wants to do. At least she would give you an estimated time frame.