advice needed!

I started taking Fenugreek today to help with milk production. the dose is 1 610mg pill a day. I read online that to actually be affective you should take this amount 3x a day. which is correct?

also my baby has been nursing basically all day long and isn't getting full. we had to give her 2 ounces of formula :( could she not be getting enough when I breastfeed her?

*** I tried to pump earlier but got less than a quarter of an ounce :'(