I don't want my wife to get pregnant?

My wife and I have been trying to have a baby for about 5 years now and she has had 4 miscarriages. It has made us become distant and our relationship has become very strained. We don't have the fun we used to...and since the last time she miscarried we have hardly had one decent conversation. I almost don't want her to get pregnant now so she doesn't get hurt again and we are pushed to the brink of divorce. Is this normal...to want to give up? Is there any way we can get back to normal? I know a baby would do the trick but I have a gut feeling that that will never happen. We are both 35 btw. Thanks for anyone who helps.