My baby is clearly unhappy. He keeps making this low unhappy sound for the majority of the day and I don't know the reason. He's feeding and pooing as normal, I'm wondering if he is teething? He has the symptoms but has done for a month and I can't see a tooth coming through and teething gel doesn't seem to help. I'm worried that I'm missing something, that perhaps he could have an earache or something? It's just the sound he makes truly saddens me.. it's hard to explain but he's clearly unhappy. Has anyone else experienced this?