Raging life companion probably cancelled visa ….

Long story short, After a blazing argument last week we parted ways
Only problem is my visa is as a life companion/dependant organised by her job
And she could likely cancel it with just an email to the HR dept who organised it?
I don’t know if it’s possible to check if she did it or not yet without leaving and then coming back in to see that immigration give me on arrival…
It has 9 months validity but if cancelled then I have 7 days TO exit or I’ll be on overstay?
Anyone have any ideas?