I've been diagnosed with Anoreixa B/P sub-type but in all honesty it's been some times since I b/p-ed - well done me!

BUT, recently the Anorexia side of things has been worsening, and I'm struggling to eat much more than either a meal OR a couple snacks.
Yesterday I decided to have a eta a lot day, but in the evening when I went to bed, I was in agony. And I was feeling so sick that when I was sick my body realised that actually there was nothing there but bile, when previously I felt like I was still full of food ready to be sick.
But over nothing I get full and it often hurts. A cup of coffee can do it even. I was just wondering if other people get these pains?
It's annoying because as much as I want to lose weight, christmas is soon and if I mentally prepare myself I can let myself not diet for 4-5 days or so before I HAVE to, and I've been mentally preparing but I'm a bit upset/anxious that my body won't let me?!
Thanks.