Insomnia Help

My 7 week old finally slept 5 hours straight, but I couldn’t fall asleep. I’ve always suffered from insomnia in some way, but I can usually manage it. I have trouble falling asleep and going back to sleep if I wake up in the middle of the night. A new baby has exacerbated my insomnia. At this rate, I’m going to burn out completely. I need to get it under control. One cannot live on 4 hours a day. Other than limiting screen time, keeping things dark, tea, a bath, what can I try that won’t endanger my baby? I need to wake to breast feed, but I need to sleep. If I didn’t have a baby I’d dope up on some NyQuil. But that’s not an option.