Dumped out of nowhere after 4 years

We had been talking about marriage, where she would like to buy a house, we had even decided a name for our first child. Then she just ended things.

I just don't understand, I feel so empty and hopeless. She said she loves me and wish she could be with me, but the feelings just disappeared. She feels lost in life and stressed at work and needs to figure out what she even wants and says she isn't able to be in a relationship at the same time.

We have spent 4 years together, she had been pushing marriage the last year, she really wanted a kid. I just don't understand the switch.

Sorry for the messy text