Trying again after loss...

In July of this past year my fiancé and I started trying to conceive. In November we found out we were pregnant. However, three weeks later at 7 weeks pregnant I miscarried. I had them at home, naturally with contractions as the baby was 4 times the size it should have been for only 7 weeks pregnant. My doctor said my uterus and ovaries look perfectly okay. Everything with me and my pregnancy had been going accordingly and was healthy. But as we had seen, they're was just a complication with the baby. I have gotten my period since then and we have decided to try again in January. I am just finding it so hard to keep hope that this time everything will be okay. I'm scared to get attached but more than anything I'm scared it will happen again.