So I stopped breastfeeding and pumping for about a month, and now I'm trying to build my milk supply…

Put baby on as much as possible and pump often. Emptying your breasts will tell your body to create more milk so the more you empty, the more you’ll produce. Be careful with fenugreek, it does the opposite for some women. Highly recommend brewers yeast pills but you must drink a lot of water with those.

I agree with the attempt to nurse as much as possible. That’s really what helped me. If she’s nipping at you, get a nipple shield to train her