Oh Diane! I'm so sorry that you have so much on your shoulders right now! I'm so sorry for your losses. I have definitely had times in my life like you're having now. It's terrible and it makes you feel like you can't breath. I know it's not much consolation right now, but things will get better for you. You just have to hang in there.
Something that helps me get through when I'm having a rough time is to focus on one good part of each day. It could be anything- noticing and being thankful that your DH did something nice for you, or realizing that you completed a big job. If I had a hard time finding something positive to focus on, I'd try to create something positive. Also remember that we're all here for you whenever you need us!!!