Confused

Maranda
July 28, 2015, I was 24wks pregnant and had a miscarriage. Well last week on Sept. 18, 2015 I found out I was pregnant again. Well now, I'm currently going thru another miscarriage. I don't know what is going on or why I keep having these miscarriages, it's not only tough on me but my marriage & family roo. The doctor's don't know whats goi.g on. Is there anyone who has ever experienced anything like this.. Any advice or help could help. Thanks in advance. -Maranda