i think every thing is a lesson.

flip-flop思前想后

speak out表達(dá)觀點(diǎn)

stick up for sb. 辯護(hù)

and I'm like,why did I say that that I gave that so much more attention than it needed to have.

然后我就會想，那件事我本不該那么在意，為什么我還要說那些。