Hey ladies. Can I get good thoughts?

I just found out I'm pregnant, due 10/22/2017. I am terrified though because I have had 3 messed miscarriages all in the weeks of 12-14. And had d&c all 3 times. I have 3 children who are all healthy and everything. But starting in 2015 we decided to ttc (my youngest was born 12/2011) so after a 4 year break between pregnancy lol. The 3 are all only 2 years apart. Lol. So biggest gap. But in April 2015 I had my first miscarriage, in Dec 2015 I had the 2nd miscarriage and I had the 3rd miscarriage in June 2016. The testing I did revealed no known causes and the babies were all normal in basic testing following the d&c's. So ya. Now I'm pregnant again and I am afraid of the same thing happening. So if y'all could spare some good thoughts or good prayers. I would really appreciate it. Tia.