pregnancy

Is it possible that your body can give you signals that it is ready to have a baby. I ask because lately I have been feeling pregnant but I can't be pregnant cause I'm not sexually active. And lately I have been smelling babies (well the smell of a new born) and I haven't been near a baby in while. I'm on birth control and I haven't been horny forreal since I been on them but now it have been pretty frequent of happening. I don't know if my body is telling its time to have a baby. I do have pcos that's why I am on birth control. Should I talk to my obgyn about this.