I can hear you and feel your pain. I don't have the answers and am to new to this to give advice, but just wanted to let you know you are not alone. I too feel like a zombie some days, swimming in mud and just trying to get to the end of the da. Other times I find myself in denial. I think the most important thing is to try and my god I know it's hard, but to stay healthy. I know for me it's doubly hard to cope when I am feeling tired, sick and run down. The emotions have the power to take over then and we lose the strength to DB. Do something that makes you smile if you can and try try try to be in the present. Don't look at photo's, letters etc, don't dwell on your memories or plans for the future and have hope.
Take care and I hope you have a brighter day tomorrow.