Need advice March Mamas!!

Sweet baby boy will be 23 weeks tomorrow. He used to sleep through the night but starting about a week ago is now getting up 2-3 times a night. We are feeding him because he seems to think he is starving! He is also rolling to his back and I think waking himself up. Once he is on his back he won't go back to sleep on his own. Any other Mamas experiencing this? How long did I last? I'm wondering if we should start sleep training so he learns to fall back asleep when he rolls himself over. Any Mamas started sleep training? Any advice would be so helpful!!