I wish i could have a baby?

me and my hubby been tryin, but every month i get my period im so jealous of my friends, everyday someone new gets pregnant, and can share their pregnancy stories, all i can do is listen and say "aww" its not fair tho, all these girls out here can get pregnant at the drop of a dime, having more than one child! half of them dont even want the baby or plan for it, and dont know what to do with it! but the woman who do want to have a baby cant even get pregnant with one! we plan and watch the clock, and every month we cry because we get our periods, i would give anything to have my own its just not fair!