How are your 11 months doing?

Hey moms of last April babies, how are your babies doing lately? I began to worry about my son' tantrum and lanuage skills. It had been very difficult to put him down to sleep since last week, he'd cry and scream for a long time and refuse to sleep even when he was already exhausted. He was rather a mellow and calm baby boy until last week, I wonder what could have happened to make him acting so differently? Have you noticed any changes in your babies' behavoir as they grow? And are your all talking simple word like mama, papa conciously?