... please learn the difference between: you're and your, you're is the contraction for you are. Your is the possessive, like mine.
:his and he's. He's is the contraction for he is, his is the possessive, like mine.

Your story is not bad, but it seems like you want to go trough events a little bit too quickly. I would advise you to take some more time for emotions and for the description of events. Also, your grammar could use some work. Perhaps you should consider a beta? But I do see some great potential and I think you could be a good writer. Just keep practising!

Poor John, so sad that both Mary and the baby died :'( enjoying the story so far, a couple of grammar mistakes but apart from that it's good :)