“对不起，我刚才失态了。”用英语怎么翻译？

失态 在英文中地道的说法应该是 forget oneself

此句可以这样说：
Pardon /Sorry, I forgot myself just now.

如果是发火了, 可以说

sorry, i lost my temper just now.

如果是哭了,或者表现得不正常，直接说

Sorry for my bad manners 应该可以了.

Sorry, I metamorphosis

sorry for my being out of composure.
很地道哦

shit! I lost my love

Sorry, I have been rude a moment ago 。