Exclusively pumping, low supply

Kaylee

My baby is 3 months old, I’ve been exclusively pumping since she was born due to the fact that she would not latch on. At first I was getting more than enough to feed her, but then started the pill which almost dried up my milk completely and stopped taking it after about 2 weeks. Ever since I’ve only been able to pump maybe 2oz every 2-3 hours besides in the morning I get about 5oz maybe depending on the day. I pump about 6 times a day, 20 mins at a time. Any tips on how to increase milk supply would be greatly appreciated. I’m already on fenugreek 3 pills 3x a day and brewers yeast 2 pills 3x a day. Have been since she was born. I’d like to keep her off formula but it’s about 1/2 and 1/2 right now.