Hi Tiredbrain. Are you still out there? I happened across your post. I'm so sorry for your loss.
There are a lot of good suggestions here. But I'm leaning towards talking to a doctor as well. Do you have a good and understanding doctor? Many people need help getting through really rough times, and a divorce/breakup is right up there high on the stress scale!
Probably most of us have had a love heartbreak at some point or other and for some people it can be extremely difficult. I completely understand. I went through the same things as you. I was so depressed and distraught I didn't think I'd live through it. But I did.
A really good therapist is helpful as well. Some medications could very help you through this difficult time.
I hope you are doing okay since you posted.