Unfortunately, intermittent depression is part of this disease (as if pain and fatigue weren’t enough).
Storing up tools that work for you when you’re feeling low is a place to start.
For me some of them are:
Meditation
Breathing exercises
Reading
Gentle yoga (preferably outside)
TV series bingeing
Cooking
Chatting with my husband, a good friend (there are only 2-3 I trust for these days) or one of my kids. (and sometimes I have to force myself to do this)
For some people a mantra or affirmation works; something positive you can repeat over and over to yourself to remind you that you are NOT this disease and that you have good things in your life and a better future