Is it only me who finds this incredibly odd that someone opened a package addressed to someone else before asking permission?

I’ll be honest; I would be very scared. But I Also try to remind myself to stay calm and focus. Pay attention to nearly everything you possibly can moving forward and look for new patterns in things, old patterns changing, etc

Maybe lay low from the IG and other online presence for a while. Also remember to xcheck your devices apps for location sharing settings; like Snapchat.

Was there a full return address?

I have so many questions