when is happiness ok?

I've never been through this before, so going through the stages of grief is foreign territory for me. The last few weeks have been strange. I've felt more my normal self than I have in months, and it makes me wonder...when is happiness ok? How soon is it ok to go about life normally, and begin dreaming and hoping for the future?

I almost feel guilty for the days that I wake up feeling ok, and even feeling happy. When my little dog makes me laugh, sometimes I feel as if I'm betraying my baby by not grieving it continually.

Someone told me once, always remember the baby, but don't grieve to the point that you become the woman your child would not want for a mother.

But still, I don't know when it becomes appropriate to be happy.