Single Parenting Support Group
Today being raised by a single parent is not uncommon. About three in ten children live in a single parent home. The most common type of single parent home is one with only a mother. However, single father homes are the fastest growing type of family situation; 60% growth in the last ten years alone.
Sorry you're having a difficult time right now. I'm sure you're giving your kids as much attention as you can. Possibly their attention seeking behavior is combined with some rules testing. They could be testing you and your family rules to see whether they are still going to be held to them. As much consistency and as much attention and reassurance as you can give them will help in the long run.
Hang in there. You and your kids will get through this and it will eventually get easier.