New here. 1st Post. I'm depressed.

So, it all started two years ago when I was rear ended by a taxi driver. In the last two years my whole world has been flipped upside down. To date, I've gained forty pounds, have damage on my brain, nerve damage in my dominate hand and cervical disc issues. I'm 29 years old and I have two children and while I was out on state disability I was let go from my job. Twelve weeks ago my doctor started me on 30mg Cymbalta. Then I was upped to 60, 90 and now I saw him yesterday and he has me up to 120mg. So, my main issue right now is when I'm alone. I can't handle being alone. During the day my husband is at work and my kids are at school and if I'm not at cog rehab or some other doctors appointment I'm home sleeping. I cry a lot and sleep a lot. However, when my husband gets home from work I feel better. Well, that in itself right there is an issue. When he gets home is when I want to start cleaning, doing laundry and making the phone calls I need to make. And that ticks him off, obviously. I'm home all day not doing anything, but as soon as he walks in I'm ready to work. And I don't know how to explain to him that it's not me being lazy, I'm just sad when I'm alone. Does anyone else feel like this or go through this? Any ideas on how to cope with this? I do have a cat and he's basically my best friend. He follows me all day and sleeps with me.