Hair falling out for 8 months!!!!

Hello ladies! I was wondering if anyone has experienced this? My hair started falling out last July, and not just the normal 100-150 hairs a day. It's at least double that. My hair in front seems to be thinner as well as my ponytail :( I have seen a specialist (dermatologist) who ran all kinds of tests, including thyroid etc. Only thing they came up with was minor vitamin D deficiency. I lost my baby boy last Feb, at 20 weeks, so I know I have been under alot of emotional stress etc since then, but I would have thought the hair shedding would have slowed by now. Anyone have any thoughts or suggestions for me? I'm sad, embarrassed, depressed, at the thought of losing all my hair. Thanks for listening.