I think therapy and an al-anon meeting would be wonderful for you, help you to gain perspective. No judgments at al-anon, people who have been through similar experiences, a very gentle program that lets you move at your own pace.
I also just want to point out that stress can NOT cause a miscarriage. Please don't think that your miscarriage was in any way, shape, or form something that you caused or had control over.
Wishing you lots of peace and strength on your journey to recovery.