My 9 month old started biting...help!

So my 9 month old just recently got his first tooth about a couple weeks ago and the 2nd one followed suit immediately after. He has his front 2 bottom teeth. Just yesterday he started biting me! Obviously it hurts so I tell him “No!” and remove my breast. He thought it was funny and started making a funny face. I tried once more and same thing...

So I pretty much pumped and just started feeding him through bottles. Now it’s the next day and when I offer my breast he legit doesn’t want it. Pushes it away or starts to make the biting face, and he bit once more so I said no and removed my breast from him.

Anyway, I know it’s super common for babies to start biting, especially if they’re teething, but what do I do?! 😫 it’s hard for me to pump around him and I don’t produce nearly as much when I do! No more than 4 oz at a time, but realistically, 2-3 between both breasts. I realllllly wanted to reach 12 months to straight up switch to cows milk and not have to buy formula.

Any advice? Thanks in advance. ❤️