Help! 5 month old teething.

Ana

Baby has two brand new pearly whites and I feel like his top teeth are going to come in soon cause he’s been fussy and sticking his fingers in his mouth. I have been breastfeeding him this entire time, but recently he’s been biting me as he’s coming off. He’s a distracted eater so he latches and unlatches several times during his feedings. My nipples feel so tender! Any suggestions? TÍA!!