why won't my twitter push notifications/show I have any notifications?

[AC Question]

I have uninstalled my twitter and reinstalled it over and over but it still won't show any notifications. It stopped working before, I'd uninstall a different app and it would work but it didn't work this time so I uninstalled, when I reinstalled it did no difference so I turned my phone off and on, didn't work. It's stressing me out and I have tried /everything/.