Normal pregnancy after premature labor

I found out that week that I'm pregnant, and I was just curious if anyone had a healthy pregnancy after a premature birth. My last pregnancy was with twins, and I delivered them at 23wks and 6 days, so I'm kind of worried about it happening again. And I was also wondering if that would automatically make me a high risk pregnancy? My dr won't see me for another 3wks so I was just wondering from anyone's past experience. Thanks