Crying after sex

Does anyone else get sad when your SO pulls out? I literally just cried. I want a baby so badly I could explode. I'm 25 and engaged and my instincts are screaming at me. Fortunately (or unfortunately) he is rational... Practical... Wants to wait until we are married and have more money and a house and stuff. I just feel stupid for getting so upset over it but I really can't help it.