Oh honey, of course you are pi@@ed off and hurt. You have a right to be. This is going to be a grieving process. You will feel ok one day, yet the next may feel completely different. Thing about that is that grief is a process, one with a beginning and an end. It wont be this way forever. Let yourself feel and deal with it so you can move on.
Tight hugs. It's ok to cry, that is part of healing. It's also ok to let your children know you are sad and upset. It will let them relate to you too. Open up, be honest with them in an age appropriate way.
Many many tight hugs.XXX