My 18wk old has gone from waking every 4 hours at night, to being all over the shop. Before last night i'd had 10 hrs sleep in 3 days. Last night was slightly better to start, but he woke at 2.30 and i couldn't get him down until 3.30, and he got up at 5.30 this morning. Is it ever going to improve again? He seems constantly hungry, and i'm so tired i'm amazed i'm not dead. (and i find it impossible to sleep in the day)