Dexamethasone is kicking my butt! Any suggestions??

Jennifer • After 2 years ttc we were blessed with a beautiful daughter who is now 5 years old. In 2016 we suffered 2 miscarriages, but we're hoping for our rainbow baby.
My dr prescribed that I take 2mg/day on cd 5-14. It's already giving me serious hot flashes. It's also making me so thirsty I can't stand it... I've had, like  10 servings of water & still going. Any suggestions to help with these symptoms?