I dont want to relapse into Depersonilization!?

So, i smoked weed once like 2 years ago and it gave me a horrible experience, and i had depersonalization for like 10 months after that day! It was so awful and i couldn't help but hate my life! Then i stopeed thinking about it one day and it started fading away, i still think i had it, i just didn't really notice it! Anyway, i have been DP free for a little while now, but now i just figured out my little brother is now smoking weed, and i don't want to be anywhere near any weed. But he doesn't understand what i have, so he will come in to the house with a bag of weed, start breaking up the weed on the counter of our kitchen, and then roll it in a blunt or something and then go somewhere with his friends and he to smoke it. He doesn't smoke in the house but I'm still scared to like touch his hands and where he touches because if he touches a bunch of weed and doesn't wash his hands, and then I touch him, and I put my hands in my mouth or something, I will ingest some THC! I don't know what to do! But what i am worried about, is when he touches the weed and then touches something else and then i touvh what he touched!? Will i get high?! I really am trying everything to not get the slightest bit high ever again! So will touching weed, and then putting my fingers in my mouth affect me!? I have a really low tolerance and i haven't smoked in over two years remember....Please Help!?

Have you ever had a history with OCD? This seems very OCD.

I think it's highly unlikely that anyone could be so sensitive to weed, that they would feel an effect from such indirect contact as you envision. I could be wrong- but I've never heard of such a thing. But it's not an unheard of form of Obsessive Compulsive Disorder- a fear of contamination- of being contaminated, or contaminating something. For some it's germs, for some it's bodily fluids, often (from what I've seen in here) sexual fluids, and in your case... pot.

Just don't inhale, hon. And I ain't tellin' you what to do, but if my little brother brought a controlled substance in the house, we'd be having a little discussion on how that's not going to happen again. Just sayin'.