Miscarriages

Mrs. K • Mommy of a 1 year old after 2 MC. Pregnant w/#2
Had my second miscarriage Thursday. I'm going to talk to the doctor Monday. So there are five reasons why I could be having a miscarriage? Low progesterone, misshaped uterus, chromosomal ....? I read on the internet. I don't know much about this. I wish somebody who has been through this could talk to me. I'm so upset. I want a baby more than anything.