wow, congratulations!
i would have to say that your chances of miscarrying again would be almost doubled. well...depending on why you miscarried in the first place though.
because i know that i was told that because i am so stressed that it raises my chances of miscarrying, or if your sucking down alot of caffine.
but if it was for really no reason, and it was just a bad pregnancy, then its probably going to be increased by 10-20%
but as long as you take care of yourself, you should be okay.