Trouble falling asleep

I work nights mostly, so when I get home I'm pretty hyper. My husband works mornings and waits for me to get home so we can eat together and see each other before bed. But I end up staying awake for hours, which makes me fall back asleep in the mornings after I take my son to school. I'm 7 weeks, I'm constantly tired until it's time to go to sleep. What helps you go to sleep quickly?