Viewing someone’s profile then changing user name

If my footprint is turned on and I’ve view someone’s profile and then turn it off and change my username and handle will they see my old username and handle or the one I changed it to. Also, if I blocked their account, will they still see my view? If I deactivate my account, will they still see my view?

Asking because I viewed someone’s profile, I shouldn’t have and then took those necessary precautions