Terrified...

I just found out I'm pregnant....I have a 4 year old little boy and 9 year old little girl.  Both pregnancies were okay...no major issues...THEN, I had a mc on Christmas Day 2016 and then another on March 24, 2016 (3 days before Easter...holidays have been horrible this year).  Obviously, I am terrified this time.  I literally JUST found out about an hour ago.  My husband is super cautious and won't even really acknowledge the positive test.