I should love my new nephew

My SIL brought over her new baby today for us to visit and while I am happy that he is healthy and was able to come home I just couldn't be around him. I tried feeding him and found myself crying uncontrollably because of my news yesterday that I had a miscarriage. I have been TTC for over 6 years and I was overjoyed that I finally got that positive. I think it made it worse that I told all my family and close friends. I wanted this baby so bad and it's not fair that the one person who is always so mean and doesn't really take care of her 6 kids gets to have another precious baby.