15 month old sleep schedule..

Kimberly

Hey girls! I'm hoping some of you may be able to help me.. My son usually goes to bed around 8 p.m. takes his nap at around 11 a.m. and will sleep for 2 to 3 hours. At one point he was sleeping until 6 or 7 am, but the past week he has been waking up ay 4:30, last night at 3:30. I will usually change his diaper and lay him back down and he will lay there, cry off and on and will officially be up at 5 am. Im not sure if he is going through a sleep regression or if im getting his schedule wrong.. I've tried putting him to sleep earlier but he just wakes up earlier. His normal is to sleep 8 or 9 hours through the night. Any advice is appreciated. Btw, i just transitioned him to 1 nap, but he was waking up like this before I transitioned him.