Not producing enough milk?

I have been expressing since birth as baby has a tongue tie that we are waiting on an appointment for it to be sorted. I am only able to get 2, sometimes 3oz per pumping session, which I can only get between 10-14 a day, my daughter has 3-4oz every 2-3 hours so it's not enough. I am trying my best to pump every 2-3 hours aswell but it's not always that easy.. should I go to the doctor to see what they recommend? As Ive heard they can prescribe something that helps milk production? I would appreciate anyways advice or stories on this. Thanks. :)