Do you exercise? Supposed to help regulate your hormones and help you sleep better at night.
Besides that... why push it? I've always found in my life, anything I have to force, usually isn't worth it. I'm not talking about the occasional struggle or "learning opportunity" but if something is continually uncooperative and not really necessary, then I just don't do it. I don't sleep well at my gf's house because their bed is uncomfortable and it's too hot. So I don't sleep there. We cuddle and then I go home and go to bed. Even my husband has taken to sleeping on the couch because on any given night, one of us is tossing and keeping the other wake.