Questions??? Scared!!!!

Amanda
I just had my second miscarriage in Aug I started my first period September 15, which by this app shows I ovulated that week after, when the doctor informed me of my second loss I was told to take prenatals before I tried to conceive again, I didn't get on them untill around my period because me and my fiance weren't going to try, I have tons of the early pregnancy signs all i need now is the miss period and postive preg test,, my question is what else could I be doing to help my possible growing bundle, so scared for a third loss. Please anyone, eating habbits, dos and donts for it anything....