Breast Milk Supply & Production: Princess

Newborn Sleeps All Night, Will This Affect My Milk Supply?

I have a 4 week old baby girl and she sleeps all through the night. She does sleep in the bed with me, and maybe one time through out the night, in her sleep will root around to get some milk, but because she is still asleep only eats for about 2 minutes. She is gaining weight just find. But what I am worried about is if my milk supply will diminish because of her sleeping through the night, or should I wake up at some point and wake her to feed her? Thank you.