3rd pregnancy in 6 months

Last Friday I got a nice pretty little positive on my pregnancy test! However I'm scared because I've miscarried twice, once in November and on New Year's Day. My dr appt to confirm the pregnancy is next Monday and I am worried that something will go wrong, and that me and my fiancé will go through this all over again.. This pregnancy feels a bit different in a good way than the other 2. But I'm still just so scared.