waking up starving

Before i was pregnant i would wake up in the middle of the bight hungry, but usually a flavored drink would curb it. 
Now its a hunger so strong it hurts and i feel is unsatisfiable! Its terrible! What can i do? I have to eat or else the pain just gets worse but i feel like this is going to hreatly contribute to my weight gain. I just want to sleep through the night again!