Stopping BFing


I am wanting to stop BF. My son is 9 months tomorrow and it’s really hard for us at the moment. He’s popping two teeth at one time and pulls on my nipples a lot and I’m afraid he will bite me accidentally. I do pump, but I’ve been so stressed lately going through personal issues that I only pumped 8 oz today. That’s only 2 bottles for him. Not nearly enough. I’ve stressed over my supply for months now. I just don’t know what to do. I planned to make it to a year but I have so much stress and I know that’s why my supply is down. I just don’t want to feel guilty for not going to a year. I need advice.