I'm having severe anxiety about the impending end of my relationship and haven't been able to eat or sleep properly in days. I barely managed to get through my day in the office yesterday and had to keep taking breaks every half hour or so to go to the toilet and cry/hyperventilate/etc. I have a therapist but I can't see her until Thursday and I use mechanisms like grounding exercises, breathing exercises, etc. 

My problem is mainly that I physically cannot think about anything except the thing that is making me anxious so my work is suffering and I'm struggling to just do normal things like chat to my colleagues - everyone keeps telling me it'll be good to distract myself but distractions just aren't a thing for me when it comes to anxiety. How do you get through a day's work when you're in that mindset?