My baby will be 3 months next week. He use to be able to sleep through anything. I use to be loud and make noise on purpose to get him use to sleeping through things. However, now he will not sleep unless I’m holding him. And the littlest noise or movement wakes him up. I’ve tried multiple sleep sacks and swaddles. Ive tried combinations of music and white noise. I try rocking him and then putting him down. I’ve tried getting him sleepy and putting him down. What ever I do he always wakes up immediately after I put him down. What can I do to help him???