I noticed over the weekend that my milk supply ...

I noticed over the weekend that my milk supply was dropping, but put that down to DD not feeding properly on Saturday and assumed it would pick up like it normally does. I make sure i drink at least 2L of water a day, and normally don't have a problem with supply at all. However today i have no milk whatsoever. DD won't drink cos she is impatient and it doesn't come fast enough for her. I can't express anything at all, only get 2-5 ml even though she fed 2hrs ago. And she is crying and whinging cos she is hungry, refuses formula out of a bottle and a cup and refuses any solids. I just don't know what to do. Am going to get some fenugreek but i need to be able to feed my baby. Am struggling here :-(