Biting and pinching

My 8 month old just got his first tooth. So he’s really into biting me lately. I tell him no and take him off then cover my breast but then he screams bloody murder and if I put him back on he keeps biting. He eventually stops but I end up getting bit at least five times in the process. He also loves pinching the nipple he isn’t nursing from. It’s become a habit every time he nurses and it leaves my nipples really sore and uncomfortable. How do I get him to stop for the sake of my nipples? Lol