Big crowds looking at me laughing and then looking away like nothing happened

So recently I’ve been in big rooms with 50+ people and every single person looks at me at the same time laughs and looks away and it’s happened about 3 times idk if it’s real or not I doubt it is bc why would people look at me then look away and continue what there doing every time this happens my heart sinks I really don’t know what’s happening I’ve recently quit smoking weed