Yeah, I'd definitely be on side with the therapists and say that you're suffering some awful anxiety and paranoia and the person is either a complete fiction or you're connecting dots that aren't really there.

I can assure you that this isn't some paranormal event - to come to that conclusion we would have to convince ourselves of so many irrational assumptions.

Though it is fun to think about this as if it was really happening - maybe you're adopted and it's your biological parent checking in on you. But again, there are infinite explanations for this behaviour if it is 'real' and most are only possible if we play some serious mind games for which we have no evidence.

But continue trying to get help and continue to talk to people you trust about what you're experiencing.