Help!

I am a ftm and have bad anxiety and depression. (I am on medications for it) I am so stressed out all the time. My daughter is special needs and it is a lot already to take care of her. On top of that we have a puppy who i also take care of and my fiancé works 7am to 7pm 6 days a week 😭 I feel like I am in over my head and drowning. I never have the time or energy to even clean anything. I feel like a terrible fiancé and mom. Then everything just piles up! Dishes, laundry, trash, etc. Everything is scattered. Baby toys and dog toys everywhere. Mail sitting all over. Just a mess. It is making my anxiety and depression worst and its so hard for me to even start to try to get things done lately. I just need some advice on how to successfully tackle the daunting task of cleaning and doing it all one step at a time and to stay on top of it.