Should this upset me

I am in a loving relationship and have been for two years. We have been ttc for a couple months now and it hasn't happened. But there is thus girl that is totally unfit to be a mother.....and can barely take care of herself and is pregnant with her 2nd child. It doesn't seem fair to me that she is blessed with not one but two babies when I can't even at this point have one. Maybe I'm be petty but it just gets to me.