Dear friend,
not so long ago I started a thread with the title "obsession" as what you say is true. It becomes the focus of your life. There is so MUCH to think about, so much to organise, apart from the sadness you have to cope with.
YOu have already started the change in being made aware by your daughters and by caring enough to want to be at your best for them as well as primary carer for your husband.
Everyone, but everyone, here will tell you how hard that is, so do not beat yourself up about it. I think a lot of us cannot even sleep as it continues to try to take over our minds 24/24
I do not know how old your daughters are, but old enough to miss your previous conversations so old enough to understand.
I thnk it is a bit like the rest of life - you have to be ready to take as well as to give, so take some good times with your daughters. Your husband is a loving man and he will want you to do that, too. ALSO, it might be lighter for HIM to talk about and hear other stuff, too.
Good luck in your new intentions. Be lighter with them and do all the heavy stuff here among friends who really really understand
Love
irismarie