This is 100% what happened....but I'll add one small addition, if you don't mind.
At some point, after she left Haworth and ended up at her friend's place in France (where she was literally by herself for 30+ days), she posted a "cry for help" post, letting her followers know that she was "better now" but in a loosely veiled comment indicated that she contemplated suicide. Then, Natti and Philip drove to pick her up and brought her to Lalande. After that brief stay, she went back to Nicki's place in France and then went on to Norway and eventually found work in a restaurant, came up with the idea of becoming a chef, I think she even went to England and took classes for getting certified to work on a cruise ship and next thing you know, she's in Africa for a time.
There are things we will never know. And that's probably a good thing.