Milk supply tanked

My baby is two weeks old and I was producing so much milk. I would get 7 oz each time i pumped for 15 mins. I pumped every two hours. Then I started pumping every 4 about three days ago and now I only get 1 oz after pumping for 15 mins. I went back to pumping every two hours and it still is the same! Only 1 oz. Sometimes barely that. My breasts aren’t even filling up any more they just stay squishy and empty all day. What can I do? I’ve increased my fluids and calories and have been drinking body armor. I’m so stressed about it.