Frustrated

I have a one daughter (not my biological child she's my niece but I am raising her). Me and my husband have been trying to conceive for the past two years. Everybody at my job knows I have a one child. But why I am venting. Anytime one of the girls start loosing weight or start asking who is next to have a baby. They always mention another girl name. But they never considered maybe I might could get pregnant. Nobody knows that I am trying to get pregnant. And it makes me so mad to the point I want to cry. I can't say nothing to my husband cause he's frustrated with us trying to conceive. And I really don't have anybody to vent to. I have tried Clomid and it gives me terrible ovarian cyst. I just want to find a corner and just ugly cry my heart out.............