"First step would be to change your username and password, just in case you were hacked. Unlikely, but you never know."
"...and ask for your A/C to be locked until it's figured out...and ask for your A/C to be locked until it's figured out" Yup!
Certainly worthwhile doing however better to log in from another device rather than ones you have been currently using if a backdoor key logger has ended up on any of the devices your currently using whatever you do will be apparent to the to the hacker from the moment you hit the keypad.
