39weeks pregnant and can't sleep help?

I'm 39 weeks 3 days pregnant and haven't slept more than 4 hours a night in the last 4 weeks and it's starting to knock me about. I have tried keeping myself bust throughout the day to tire myself out and it makes me extremely tired but I still can't sleep, iv tried baths with lavender essential oils, relaxation music. I'm getting to the point that I want to wake up my partner who sleeps like a baby just to make him suffer to lol. I'm also getting very emotional and I cry a lot because I'm so tired. Any tricks or advice would be highly appreciated.