“My 21 month old son in the last couple of days has been crying at a drop of the hat. Its not like when he throws a tantrum. He is playing happily then the next minute he’s on the floor in tears. Even at night he is waking up screaming in tears. He is normally a fantastic sleeper. Is this normal behavior, I’m starting to get a little worried because he is normally such a happy child. It just feels that something or someone has made he feel so upset.” Do you have any suggestions for a 21 month old that is upset all the time?