Haakaa Question

I struggle with pumping, my breasts don’t respond well, but if I use the Haakaa on the other side while baby is eating, I get about an ounce and if I do that all day I can save 4-6 ounces during the day. My baby just eats off one side during each feed so two hours later I switch it. Am I only pumping foremilk this way? I have an electric pump but it’s not that much better and takes forever. I get about twice as much with the electric pump though, it’s just hard to find the time because it doesn’t work well unless I haven’t fed my baby in a while and then baby is unhappy because all the milk is gone. The Haakaa getting one ounce each feed really does work best for both me and baby, I just don’t want to cause an issue for my baby if it’s all foremilk.