My baby will not sleep on his back. The only way my husband and I get any sleep is if we take turns with him sleeping on our chest. He also refuses to not be held. He has been like this since 3 weeks and he is now 6.5 weeks. He naps awesome on his tummy or on a person but literally nothing else. Also he does not like to be swaddled but still startles. I'm not going to set him on his back and let him cry it out. Any suggestions to get him to sleep on his back?