10 weeks and mixed up his days and nights again

About 4 weeks ago my baby finally started understanding day and night and would sleep at night. Now at 10 weeks hes all of a sudden waking up at 1:30am and thinking it's time to play?! I cant get him to sleep so I'll get up with him keeping bright lights off and let him play for a bit before he falls asleep. That causes him to nap alot during the day. I dont have the leap app so I dont know if this is normal for his age? I'm used to his energetic smiley self during the day and it just hasn't been that way for about a week now. Naps and bottles are what he wants during the day. Cuddles and play is what he wants in the middle of the night. How do I reverse this AGAIN?