17 and wanting to be pregnant?

i dont know why but ever since i started being in my teens i've been almost obsessed with babies. Not just with other peoples but having my own. I know this is not normal but everytime i hear of someone having a baby i get a pang of jelousey that stays with me. It's not as if i want the baby to dress it up and tote it around but i want somthing to love unconditionally that i can nurtute and take care of. i even dream about having babies. i need a way to fix this.