Advice genuinely needed

[jowinterbourne.pa]

I am not educated in any way when it comes to computers, routers, wifi, ip addresses, mac addresses etc etc. I have been worried for some time that a person close to me who has my username and password for wifi and has set up chromecast in my home in the bedroom and living room on their google account has been spying on me. I realise I sound ridiculous but they seem to know a lot more than they should about me. I have unplugged the chromecasts when they aren't around and then plugged them back in before they noticed and they have then asked me who was disconnecting them. I also changed my router username and password and reset the chromecasts but when they visited they became agitated about me making these changes and reset it all to their google home account again. I realise I sound crazy but seeing as this person has a degree with this kind of stuff I am worried. Is it possible to run some kind of test to find out? Thank u

 

[COLGeek]

Please ask a question once and wait. You have posed an interesting set of questions/concerns. It may take a while to get input from others.

 

[Ralston18]

Unfortunately this does not seem to be a computer, network, or technical issue.

More of a trust and relationship matter.

You need a third party mediator to help you in dealing with that "person close [to] you".

Especially if they get agitated and you feel uncomfortable or unsafe.

Any actions you take (e.g., "some kind of test") may end badly.

Get immediate help from other family, friends, or even law enforcement if you feel trapped.

 

[COLGeek]

I am not sure how a Chromecast (as implied) could be used to spy on you.

If you have changed your wireless network and router admin credentials, this person should not be on your network.

Have you authorized this person to be on your network?