Wtf is going on?

So i used to be a pretty big stoner. And for 2.5 years i smoked every single day ranging from 1-3 joints. It was like a ritual to me, however i saw the red flags and quit cold turkey. That was around 1.5 years ago now. However i have noticed now,that whenever i very very rarely smoke. It takes absolutely nothing for me to get extremely affected by it. And im not talking tolerance. As i was never affected by it like this. If i even make a joint with as little as 0.04grams of bud it will make me uncomfortably high as fucking shit. Not in a nice way either. It’s like my whole brain turns on every alarm and i get mad anxiety and racing thoughts. And i can barely move. I have tried different strains etc, so it’s not a laced batch or smn. Im not really mad that this happens as i have no plans to start smoking again. However i would like to hear if anyone has any idea as to why this happens.

Thanks in advanve