That’s normal. Best to just relax maybe have some food/drink and eventually you’ll sleep but it’s not a party drug if you’re gonna work the next day or something

Melatonin is effective ~5 hours later. No need to take more than 0.3 mg.

What you should try is L-Theanine just before going to sleep, it's effective against Caffeine, not sure about Psilocybin.