u/DisastrousAffect2051

Hey guys, im living in belgium on a D visa and my work permit is until the end of this month since that's when my work contract ends. I'm a british national. I was just wondering, do I have to leave immediately or, is there any possibility to stay as a tourist because of the 90 days schengen travel allowance? Or would i have to leave and re-enter again to become a tourist (and if so do I have to go back to the uk and come back or can I just go to another schengen country?). I've tried contacting the commune but had no luck. Thank you