Low amniotic fluid

So I am 35 weeks pregnant & they discovered my son’s fluids were low on Thursday. They sent me to get steroid shots right away. Now I have read that drinking water and staying hydrated can help replenish the amniotic fluid and I wanted to know if there was any truth to that. I went today and they said that if his fluids are still low on Thursday then they will deliver which I’m not mad about since I know it would be healthiest but I just wanted to know what are the odds of his amniotic fluid going back up?