I agree with gentic, that you need to build yourself a routine. Get up and get cleaned and dressed. It really does help. Maybe go outside once a day. Even if it's just to stand on the back porch and take in 5 minutes of sunlight. The vitamin D may help you. Seeing the sky may help. Sometimes being inside all the time can make you feel like a prisoner.

And give your grief time. Every day, every moment, one step at a time. That's all you can do.