I need some help ladies. Two weeks ago from today my baby kept throwing up. This caused me to have an oversupply again…

I need some help ladies. Two weeks ago from today my baby kept throwing up. This caused me to have an oversupply again when my boobs had just regulated. Well the past few days my right boob finally regulated again but not my left. Even after 2 weeks. So today he started throwing up again. If it's like last time and it lasts a few days ik I'll end up with an oversupply again. Is there something I can do this time to not end up the same way? I'm really trying to stay clear of mastitis. Also I have had a few women tell me to pump to help but I can't do that as it would tell my body to keep making more milk.