Cuppasoups are quick to make and easy to drink, they dont feel like food but are better than nothing.
Also, decaff latte would be ok, plenty of milk which is good for you both. I agree that smoothies are good too, anything that tastes and feels like a drink is far easier to digest.
I understand the loss of appetite, when I found out about H's affair, I lost 2 stone in 3 weeks, and at 5 weeks post partum, I was very ill because of it, but a PP is right, the less you eat the more ill you will feel. Dry bread even, and just one bite at a time many times throughout the day will help.
Please take care, your pain is almost tangible in your posts, I wish that there was a magic wand that would take it all away. We are here for you.
Where are you in the country?, maybe there is an MNer near to you that would be a good friend to you. I would be happy help if I am near you 