Mommies, can anyone tell me if they've had similar experiences? My fir…

Mommies, can anyone tell me if they've had similar experiences? My first birth five years ago triggered a suspicion of VUR at 37 weeks, with a weight of 1.5 kg (everything turned out fine, 3120 grams, 50 cm). Now I'm 35 weeks pregnant, and I expect labor to start around 37-38 weeks. Is there a chance I could go past 40-41 weeks? (I really want my baby to gain more weight.)