Even though Harry is 18 months old now, i remember (vividly) how he slept when he was little. I would be lucky to get 20 mins out of him during the day (he would probably do this 3 times a day) and then he would wake every hour in the night - very hard work! But something magical happened around the 12 week mark - i really started to tune into his tired signs and he slept for 40 minutes - then 1 whole hour!! Then he was only waking for one feed in the night. Bliss!! Then at 6 months he started to sleep through and has ever since. He also sleeps for at least 2 hours for his day time sleep now (he only has one sleep). So I guess in my long winded way, I am trying to say - don't give up! As they get older they get better at going to sleep and you will also get to know them. Good Luck!