It's not paranoia. My postal carrier has it out for me. She might have me believe that the moment I start watching my mailbox like a hawk doesn't in any way correlate to how late the mail has started coming. It used to come at noon... now it's coming at three pm. Three! Coincidence? Hah!
The raven that is hovering in the corner... however... is a coincidence and probably not ominous at all.