My LO is 4 months and is rolling over from back to front but not from front to back. He is too big for bassinet now and hasn’t slept in crib because he rolls to his tummy and gets frustrated after awhile. He also moves around crib a lot. I don’t think he likes all the space. We have been co-sleeping the last two weeks and he sleeps well next to me but is starting a habit of rolling over and suckling on my breast (I breast feed). I’m worried he will get in the habit of only falling and staying asleep while on the breast. Any suggestions on what to do? My back aches from sleeping on my side so carefully and half asleep.