need some advice from exclusive pumpers

CD • Ella born 12-27-16 🌈
I've been exclusively pumping since 2 weeks pp. I'll be 5 weeks pp this week. I am pumping right around 20oz a day and pumping an average of 7 times for 20 minutes. I'm really trying to increase my supply. I tried fenugreek mothers milk oatmeal. Nothing seems to work. Is this the amount I'm going to be stuck at? Like is it worth it to even try to increase at this point? I really wanted to be able to freeze and stockpile.