Very upset today

My husband and I have been trying for just over ten years to have a baby having miscarriage after miscarriage and found out a family who has abused her body in many ways is pregnant with twins. I'm happy for her but jealous at the same time. It's so unfair. I recently miscarried twins. I know I'm being a silly brat but I just don't understand why I and some many others can't have something we've wanted for so long and the ones that aren't ready or capable of being a parent gets the privilege of having a baby. I know when God is ready to bless us he will but when, when will it be our time.