Sleep problems

Ar

My little guy is nearly 19 weeks now. I figured he was having sleep regression which has now turned into him sleeping in bed with me. He doesn’t sleep for more than a 2 hour stretch and everytime he wakes up, doesn’t open his eyes but turns his head looking for boob and if he doesn’t find it he gets upset and starts crying. I always start the night out by putting him in his bed but give up when he wakes not even 2 hours later wanting to be nursed. I’ve even started him on oatmeal for the past week or so and it doesn’t help to make him sleep longer. I’m not sure what to do at this point. I wanted to transition him to his crib but he wakes too often and I would be up and down all night long. Any thoughts? Does anyone else babysit look for boob all night??