What a great mom you are! I'm sure this is hard on the family and you are doing the best that you can - and I love that your concern is for your kids and family. Right now, everyone's concern is for you. Don't let those worries and concerns get the best of you because, what you must do NOW is to relax and rest and let hubby take care of the kids. You can tell that there is a lot of love in your family!
Your kids are young and resilient - this too, will be forgotten. Let this be one of those "all about me" moments in your life and let your husband take care of the rest. They need their mom back and soon, you will be. Maybe having a special candy or small toy/sticker dish or a cute "special box" in your room would help and give them something to look forward to, when visiting, and they can pick one item out, for each visit. Or just have specific toys or games and things in your room that they will use, while visiting - a puzzle, coloring books, small toys like "littlest pet shop" figurines, etc...
Best of luck to you and your family.