Hi,
My little ones both had tongue ties and when they fed the clicking noise was there. Apparently in their case it was because the tongue tie wasnt allowing them to latch on properly and air was entering the mouth - resulting in both of them being extremely extremely windy! Are you bottle feeding or breastfeeding? My son's tongue tie was 'snipped' at 3years old for speech reasons and for my daughter, we were much more aware second time round so A's tongue tie was 'snipped' at 6 days old.