我很后悔昨天在会议上说了那些话 这句话用英语怎么说

those words i said in the meeting yesterday made me so regretful

I regret what i said at the meeting yesterday.
Im so sorry for what i said....

I very regret I spoke those words ai the meeting yesterday.

I am very regret that I spoken those words at the meeting yesterday.

I‘m so regretful for what I have said at the conference yesterday.
conference比较正式的会议,meeting比较通用,一般会议,小会议.