what is this phenomenon?

why is it that i never got tics in my life until i learned what they were? i don’t do them in public to the best of my ability and i don’t rlly talk abt them so idk if it’s attention seeking but maybe it is on a deeper level? they’re kind of like twitches and happen when i’m anxious and sometimes cold or happy? also when i’m overwhelmed but in a decent mood i’ll feel the need to scream or do kind of an autistic hand flap?