Chances of another miscarriage?

Madeline
So, I got pregnant back in March of 2015, and miscarried in May, at 12w2d.. 
I just took a pregnancy test because my husband and I are trying again, and I didn't get my period. And it was positive. 
We are extreay excited!! 
But I'm secretly really terrified of having another miscarriage, and I don't know what to do, or feel. 
I'm scared of getting too excited to have my heart crushed for the second time..