I normally get 4-5oz each time I pump. This morning I only got 2.5oz so I made sure to drink extra extra water before my next pump. I just pumped and only got 1oz. Yesterday I had my usual output. Last week I did have my first pp period and output did go down by half for a couple days, but went back to normal. Is it just an off day or am I loosing my supply? Also, I took a shower around noon and my boobs felt very empty/nothing there.