Yes, I completely understand the escapism. If something is giving me anxiety or has triggered anxiety / depression, I have to work hard to be productive at least some of the time. Otherwise, I too obsess over some things: like immersing myself in computer games, or something tedious and mind-numbing (like cleaning), to avoid doing work (especially if it's related to what's triggered my anxiety / depression).

The best solution for me is to set some sort of goal as to what I want to accomplish. I try to be realistic (do X number of assignments today). I start slow, but I try to build over several days (or a couple weeks) until I am working close to "normal" speed.

I don't know if this helps, but I'm sending you hugs.