Expressing stuff

Ever have the feeling when you're super upset and there's this turmoil of emotions within? And there's all these words stuck deep down and it just doesn't come out either because you'll break into pieces or it's just super stuck? And in the end, all you can do is put on a stoic face and say 'ok'... But it frustrates you all the more, because you can't express what's going on within you and you leave the other person totally clueless(and totally misunderstand you). It's like that with me nowadays.