I'm sorry for your loss. It must feel pretty bad like losing half your body and mind into an oblivion that you can't pull them from. Others have already said great advice and you most likely know more than is listed, however just in case and because I hope someone would tell me anything that could possibly help, I will list a few things. Surround yourself even if you feel you want to hide. They will bring a little light and support to your dark moments and heavy heart. The shock is not forever, so please seek support groups, go to church if you are religious or if you feel it just might help you even if you don't talk the environment is supportive. Counseling may be expensive, but if you have health insurance try to go while you still are in shock and capable of somewhat clear thoughts. If no insurance, try to seek advice of how to get the counseling from the state insurance location in your state even if you are not looking for the insurance. They have connections they can connect you with. Churches also may have ways to connect you.
In the end however, I'm sorry for your loss and no words or actions I or many others can show will remove the pain you feel, but only support you from further depths in which pain can drive a person long enough that you can sort through your feelings and see a bit of light without the support so that you may continue to live and see brighter days once again. It won't ever go away, but you will be able to cope with it better as time goes on so that you can see those brighter days again. You may not want to see them ever again, but for now, seek stability and comfort so that at some point it may come around again.