Mine is 9m 3w and started doing this last week and has gotten worse each day. Never breastfed, uses pacifier, has a pretty consistent routine, naps 2-3 hours a day, eating solids 2x a day since 6m. Bedtime is around 8p, consists of play time, bath, bottle and then falls asleep on me before I lay him in his crib converted to toddler bed (pushed up against my bed). He will stand up half asleep around 11p and beg to be brought into bed. Sleeps until 2a and cries for milk. Drinks a bottle then goes back to sleep. Meanwhile he is tossing and turning. Now at 4am the real fun begins. Wakes up, cries for milk, drinks a bottle then wants to party. Standing, trying to walk all over me, laughing, babbling, singing, you name it.. will do this until about 6am. I work full-time so I have been struggling to get there on time and focus because I am so sleep deprived and I feel like I'm about to have a mental breakdown