Breastfeeding while teething

CMP

Any suggestions? It seems my little (12 weeks) is getting his first tooth (I can see is under the gum and is feels a little rough). When we feed he eats for 5-7 mins and then has a full blown melt down. I try to put him back on and he will latch for 3 sucks then start to struggle and pull (ouch!) then unlatch and continue to cry. I know I have a strong leg down sometimes but he is also eating his hands and drooling everywhere.