My brother in law has to do what you are doing often because his work schedule will fluctuate between second and third shift. He uses melatonin to help get him to sleep, which your body makes anyways, but sometimes your sleep schedule gets thrown off and it's nice to have a little natural support. I can empathise with the stress of not sleeping (I have chronic insomnia, and try to to it natural). I have tried meditation and reading to calm down my mind when it's time to sleep, if that is your thing. Other than that, I don't have any great ideas, but I hope you can get yourself sorted, we heal when we are asleep and it is so important to get it x