My three month old, who is usually very happy and goes down easily, has suddenly become quite cross and upset, and has started crying during breastfeeding sometimes, which is very unusual for him. He's also getting very upset before going to sleep, as well as dribbling a fair bit, and trying to chew his fists (when def not hungry). It coincided with his second set of jabs, so I am trying not to be paranoid about them having affected him in some way (which I know Is nonsense), the only thing I could think of was teething. Did anyone else have an early teether, do you think that's what this is, and is there any way to relieve symptoms at that age? I've just left him with my partner after 45 mins of crying at me, getting me down a bit.