I feel this deeply. When I have been really depressed, it is like all my creativity has drained out of me, and I second guessed even boiling water when I am actually an amazing cook. I am very lucky my mom likes to cook with me (she calls herself my sous chef, so sweet) and put up with affirming me almost continually for awhile when we cooked together. I hope I never end up back there; dark times. Having a therapist has also really helped. I hope you find a way back to your creativity. It may never be quite the same, but I promise it can be great again in a new way. Baby steps, not giant leaps.