Eliza's appearance as a prim and proper beautiful young lady coupled with her perfect English accent surprised the guests; and they began to speculate as to where she came from. As they listened to her talk, they found her weird but Prof. Higgins explained that it was the "new small talk."
The mistakes with the sentence is that there should be a semi colon after the word week and there should be the word should after “I think I”
here is the sentence correctly
I’m exhausted after so much work this week; I think I should stay home and go to bed early.