I just can't do it again

I have now suffered two miscarriages. The first one tore me apart when we lost our first child at 9 and a half weeks. This happened in March. I found out this past weekend I was pregnant again and was so happy. My dreams have been crushed once again. AF started and my doctor said I  had a chemical pregnancy. I am so upset and just don't understand why. I just don't know if I even want to try again. I am not sure if my emotions can handle another loss :( how has anyone else dealt with this? I am terrified that when I do become pregnant that I will have a hard time attaching myself to the life growing in me out of fear of losing it