I'm not sure that sounds right...generally at 24 weeks is when, if you went into labor, and it couldn't be stopped, they would have intensive care plans ready to go to help your baby.
That being said, I'm sorry, I'm not sure the worry is going away ç/ I'm 26+4 today, and I'm still worried...Google is an evil thing. ...before i was prego if you'd have asked me the chance of stillbirth of have thought it was one in thousands. I will say evil Google has medical opinions that debate the value of intensive care for a fetus less than 26/28 weeks.
The best advice i can give is try not to think about it and enjoy things...much easier said than done i know. This past week we've started baby's room, my shower invitations went out and presents are staying to arrive, i have my first official third tri appt this week, then we start baby class, have babymoon and shower....and then it's November and I'll basically be full term...