My condolences for your loss!
I have some nutrition posts on my blog that may be helpful as you recover. See the link below in my signature.
Your hormones will take some time to shift, so do be patient with yourself. Get your D3 level tested and sun/supplement to 50-60 ng/ml to help with hormone balance and fat loss. Magnesium before bed to help with sleep.
Gentle walks for 1-2 hours a day, crying to release cortisol, some resistance training 1-2 times a week to increase your muscle mass. Check out the free PB fitness PDF on the blog.