Another lovely baby poo question for you mamas 💁🏻

So baby boy has been having regular poo's of the same colour/consistency and texture since 2 weeks old. He is now 12 weeks. However he has been pretty irritable for the past week which I put down to a spurt or wonder week, but he has had one poo like this everyday for 4 days now and is still irritable. It's quite stringy and mucusy whereas before there was more lumps. It also smells a little, unlike before when it smelt sweet. He is breastfed only. No other symptoms but wondering if it is normal or we need to get him checked? Please help!! X