Can’t Sleep After All Nighter! HELP!

So last night I pulled an all nighter because I had to be up super early for a road trip so I figured I’d sleep in the car which I did for only an hour. I feel exhausted, but I can’t sleep and my anxiety is making it worse. I know my body will fall asleep on its own if I’m that tired, but I’m afraid I’m keeping it from doing so by worrying so much. I have to do a lot tomorrow so I really need to rest. Help!