Not producing enough milk....

So im 5wks pp. I've been trying to exclusively breastfeed but haven't felt like I'm producing enough milk. I'm constantly feeding her almost every hr and a half and this week she's no longer sleeping for 3-4hrs straight at night. *really miss those days* I decided to try powering pumping to produce more milk but barely get 3 oz between both sides which took almost an hour to produce. Have anyone tried power pumping (ex: pump for 20mins, rest for 10, pump for 10, rest then pump 1 more time) and started to produce more? How long long before you saw results and how many times a day? Also, have anyone tried lactation cookies or mother's milk tea? Thanks!