Are these symptons of an information security compromise?

1. Some guy is able to monitor your network traffic

2. He is able to view files on your computer

3. Your ADSL-router/modem is acting weird (WIFI gets mysteriously turned on and such)

I am a very important person, and I am transferring some highly confidental information. I fear, I may be in immediate danger.
I use Linux Mint 13 LTS.

Best regards, Sir Sultan Sikio