Actually playing games during dire emotional states throws fuel unto my dissociation/depersonalization/derealization problems; but just mindfully sitting in my favorite place in the Temple of the Moon on a private vanilla WoW server works great for me. The sounds, music, colors, lighting effects, and water create a very zen space that helps me observe my thoughts and feelings without getting so tangled up in them. That kind of presence helps me better understand what is really going on and how it all happened.
If things are merely bad then maybe I'll play some original Sims 1 or Rimworld on the coziest of settings. So long as there's no nest of trash around then it's probably okay. Eufloria in relaxed mode is a lovely RTS game that hasn't ever caused me any problems.
Hopefully you find your way through this soon!
Reducing your dose in order to feel safer is a bad idea. Why not instead focus that anxious energy on educating yourself in a new science hobby? There are many interesting projects involving estrogen!