Breastfeeding HELPPP

What can i do to increase my milk? I breastfeed and give my baby formula as well. I’m currently drinking the mothers tea but it doesn’t seem to work i drink lots of water as well. I do produce but not enough i feel like she doesn’t get full, plus my right boob is the one thats full in every morning and the left is empty 😒 & i don’t pump .. should i start pumping ?? my baby is 3 weeks