I am immune to weed?

i am a light weight to everything but yesterday i just tried weed for the first time. i kept takin some and takin some cus i didnt feel anything at all. I was getting pissed and i am pissed. with all my high *** friends around me. i had 5 bowls to myself in desperation but nothing happened. Totally ruined my day. And yes i was smoking it right...so is it possible to be immune to weed? it wasnt chronic just normal stuff. I also take paxil every day for anxiety issues so yea