Yeah, same here. First 2 years of smoking were GREAT. Then suddenly everything changed & it's exactly like the guy before me said.. By the way, it also started to get nasty for me after i smoked some "laced weed"...& i also stared in the mirror that night, too.
But I honestly believe it's all just in your head. It's just your thoughts making you feel this way (i find weed sort of magnifies them).. & it has nothing to do with the weed itself.
For example, when weed was still good for me, i used to not care at all that i was stoned while making a long order at a restaurant. I'd barely be able to remember the order & just trying to appear sober to the waiter. In the back of my mind though, the situation seemed hilarious cause i felt i was doing something I'm not supposed to be doing.
These days, if i smoke up, the last thing i wanna do is place an order cause i think to myself stuff like "What if i mess it up real bad, is he gonna notice I'm high ? Or will he think I'm retarded? I'm gonna make a fool out of myself.. i just know it, i really don't wanna order, bla bla bla" Negative... insecure thoughts that just make me super paranoid & i end up making a fool of myself indeed. Back when weed was good, these things didn't even remotely cross my mind.. I would just be in the moment, trying real hard not to laugh while ordering, especially if i mess up the list... In the end who the hell cares what some random waiter thinks of me?
So I think it's self-esteem/self-worth issues, & paranoia about getting caught in my case. If it's similar for you, then my advise is to remind yourself that no person is better than the other.. We're all equal & worth the same and we all have the ability to do whatever you'd like.. I know it's easier said than done, but if you can change the way you are thinking, surely everything will be better again & the panic should subside. You just have to believe in yourself that's all there is to it.
Peace