I would like to know if my use of phrasal verbs in these sentences is right and if someone might correct all my mistakes:
My cousin Thomas has invited me to his wedding. I must get back to him this afternoon without delay!
After a few months of peace, feelings of violence started coming up.
You think I´m playing at something. But I´m not, actually.
It is imperative to calm those crowds down.
Well, thank you.