Please help... 😭

My little man turned 1 in October and for the last 2 months he will not sleep through the night! He goes to bed at 8pm wakes up at 12:30am has a bottle and goes back to bed then maybe 4-5 hrs later he will need another bottle or if that doesn’t work he needs to be in our bed and wakes up at 7:30am ... he use to be a great sleeper he use to sleep from like 8pm-8-am!! ( he only naps once a day from 12pm-2pm sometimes until 3pm)

I’m not sure what’s happening... please help mommas!