“对不起，我失态了。”用英文怎么说呢？谢谢！

Sorry, I was inappropriate,
I apologize for my nervousness,
Sorry,I just forgot about myself,

depends on the context

sorry, I forget/lose my manners.

对不起，我失态了

Sorry,I forgot myself./
Sorry,I lost control of myself.

Sorry , I am of malpractice.

Sorry, I loss of