Valerian root has been a go-to for some peeps I know for sleep. L-theanine and chamomile are also pretty chill for stress. Passionflower and lemon balm have also got some buzz around for calming nerves.
Regarding stress, I managed to control it through some individual therapies at this holistic psychiatry in NYC. We dove deep into my work stressors and explored techniques to handle them. They recommended a blend of meditation, breathing exercises, and even certain teas. It's more about finding what works for your body and mind than just pills.