So to our surprise our little guy is a very very active and loud baby. We both were quite mellow babies so a bit unexpected... These last few days his behavior has been so extreme that I'm getting kinda worried. He yells and screams so loud during lunch/dinner and when he's in his play pen. One minute he's eating happily and then suddenly he yells or screams. He also seems a bit behind not pointing or looking for us/a toy when we ask where is mommy etc. At the same time he can be so happy and loves crawling on top and over me on our bed. Does this sound familiar to you? Do you think I should be worried? It made me sad today I wasn't able to stop the yelling(tried ignoring and staying calm/whispering)..