30w ultrasound and dr visit

April
Today I went for a ultrasound and regular Ob appointed. Little did I know I was going to be told I'm close to preterm labor. Started from Braxton hicks last through out the day , It's caused by dehydration. I'm from Louisiana and it's humid and burning hot here. I don't do much but this past Saturday was my baby shower . I had that to do , unpack everything ect. I'm 30 week today and don't know how much longer I'll last pregnant. Dr is saying 37 weeks.. Anyone else have a baby around 35-37weeks or even 30-34 weeks and baby is okay? Babys weighing 3lbs 4 oz