White tongue?

Jenna
So I've noticed my lo has had a white tongue for a little while now. It doesn't bother him when I try to wipe it. When he feeds he seems fine, he does have like two feedings everyday where he's wicked fussy but then some feedings he's fine.. Half the time I think it's cuz he's wicked hungry or mad cuz his diaper is wet. But there isn't white stuff anywhere else. It's hard to wipe off tho because his mouth is so tiny lol anyone else have this issue? He's 5 weeks old.