I might have accidently eaten a little crumb of a marijuana brownie?

Some people at my lunch table were sharing some marijuana brownies and they passed the bag with the brownie in it to me and I didn't want to eat it so I passed it back and I saw some chocolate crumbs from the brown on the edge of the bag from where they had broken off pieces of the brownie and it was where i touched it. I grabbed the bag with my left hand and I ate afterwards and worried I might have gotten some crumbs of the brownie on my hand that I ate with. I have OCD and I have been obsessing all day that this could mess me up. I know there is barely any chance i accidently ingested any. But if I did accidently ingest a miniscule crumb will it harm my body in anyway?