Is this normal

I've been having very bad Braxton Hicks . Sometime I can do nothing but lean over until it's over . I'll be 29 weeks Tuesday . I'm a very small person . I'm 4"10 and 147 pounds . I'm very scared my son will be born early because He will run out of room . I know I don't want him to be born this early. I just hope I can make it to 35 weeks .