Sudden drop in supply

Di

In the last 48 hours my supply has gone from at least 5 bottles a day to less than a bottle all day.

I’m at a loss. With only a month left to go for my boy I’m not sure it is worth trying to get it to restart but I’m stressing because my son is back in daycare and still drinks at least 3 bottles there. 😭 any advice or known culprits?