You must feel miserable. I'm sorry! I have been there before (as much as I possibly could be with kids) and I remember feeling stuck. I'm not great with advice in this but I'll tell you an awesome advice I received. Start small. Maybe decide to take a 15 minute walk every day after work. Then, give yourself grace. If you can't do it don't beat yourself up for it. Depression is, after all, exhausting. Hope you are feeling better soon!