Feeling alone

My husband is severely depressed and dealing with anxiety and some OCD, and I’m also suffering through an ectopic pregnancy/miscarriage that’s extremely painful. I feel like I’m holding the last thread of our family together and I’m completely exhausted and In pain. Medication isn’t helping him, therapy isn’t helping him, nothing I say or do is helping. I feel completely alone and helpless. Is there anything more I can do? I’m so tired of seeing him this way. I need support too, but he can’t help me right now. And caring for him and our two year old, while trying to recover feels impossible.