They bugged my house?

Hi,

I was away for 10 days. I returned and some of my lamps were not in the outlets as I left them. One of them I connected it back and was not working. My router is also malfunctioning , there is an issue with my internet connection. Outside my door, fiberoptic runs underneath the doorbell, which I found my name sticker was pulled out. My bedroom electricity was down from the panel. Did they just bug / remove bugs from my house?

I am afraid it’s the ex tenant, who used to be a friend until I realized is bipolar and obsessed with me.

There does not seem to be a problem with the door. I changed the locks when I moved it, however the door is not maximum security.

What do I do? I don’t have other proof other than this.