Leap #3 or Teething??

Ch

My baby was 12 weeks last Thursday. Since Thursday (5 days now) he he has been fussy, can’t sit still, waking up every three hours at night to pretending he’s hungry, excessive drooling, and refusing the pacifier. He has been spot on with the other two leaps. You can see the outline of his bottom two teeth with the massive amounts of drool it makes me think he is teething. Anybody else experiencing this? I’ve been so spoiled with my perfectly happy baby that sleeps all night this week has killed me! 😭