After a difficult time, I've forgotten how to get ready properly and often walk around in sweatpants or dirty riding clothes. What should I do?

I'll try to explain myself. For a long time, I paid extreme attention to how I dressed, wore makeup, etc. One day (I don't want to say the reason), I had total self-doubt and was completely worn out. During that time (which lasted a very long time), I didn't recognize myself anymore and developed an illness called dysmorphophobia. I stopped leaving the house, nothing… Now I've been stable for a while and am doing my own thing, but it bothers me that I can hardly summon the energy to get ready when it comes to my appearance, to put on decent clothes, etc. Everyone in my family dresses decently, and then I think to myself, how am I walking around, and when I do put on decent clothes, I think, where is my self-confidence from before? Where is it? I feel pretty, and maybe I am. I get insecure really easily, even though I was never ugly before—quite the opposite. 😕 How am I supposed to get out of this? How do I become myself again?