haunted, It's a one step forward, two step backwards scenario and it happens to all of us in the beginning. Mourning takes as long as it takes and each person deals w/mourning in different ways. It takes a lot of time and you can't expect to over everything within a couple of weeks. Seeing your h set you back and it's normal.
Are you seeing a counselor or in a support group? If the answer is no, then it's time to think about joining a support group in your area. Check around at your local church or look for parents w/o partners, divorce support groups, etc. You need to have a "live" support group to lean on when things really get you down and you can call someone or meet up w/a live person and talk things out. This forum is great, but you do need real people to lean on as well.
Cry, vent, beat the stuff out of a pillow, but you have to work through those emotions in order to get to the other side.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.