Hi Marcela,
It sounds to me like you have a particularly high level of sensitivity to certain things...although I can relate. Last week I was woken up during the night by a dream about a woman who had been strangled; in the dream I was in an unknown house and was trying to get impressions of what had happened there, when suddenly I felt intense pressure on my throat and the sound of screaming in my ears. It woke me up, but after going back to sleep I had yet another dream about a young boy in a hospital bed somewhere who had had his arms and legs fairly violently ripped from their sockets in some type of mechanical accident.
I think what happens in those types of situations is that while we are asleep, there can be spirits passing by in F23. I didn't get the impression that the motivation of that woman in particular was malevolent; she simply wanted somebody to know what had happened to her.
Unfortunately I'm not good enough yet at being able to see other people's emotions/experiences *as* other people's; her fear and the pressure on my neck scared the heck out of me, and woke me up. You may remember that in the film The Sixth Sense, Cole had essentially the same problem. Spirits were scaring him very severely, but they weren't intending to...they actually wanted help.
About the only thing that I can really recommend is that you try and read and learn as much as possible, since the greatest antidote to fear in my own experience anywayz is knowledge. I suspect that one of your major problems right now is that the logical part of you is attempting to find some kind of at least apparently quantifiable model that you can latch onto; a map if you like. That is actually the main area where Bruce's work is primarily beneficial, and I'm sure that if you read about all of the different focus levels and the different characteristics of each, as well as the retrieval archive here, that will greatly help you.
Without meaning to leech all of the wonder out of this, what many of us have discovered would tend to suggest that there are a lot of extremely consistent patterns within the Afterlife and what occurs there...it's just good at making it look as though there aren't.
My own "Interpreter" was initially extremely uncomfortable with a lot of what I was seeing, but all I really had to do was create a new set of expectations, to a degree. There is a consistent logic here a lot of the time...it's just identifying it that can be tricky. Once you've got some more experience with retrievals and a few different types of experiences, I'm sure you'll discover that...and that will go a long way towards erradicating the fear you are currently experiencing. Try and focus on wonder, rather than fear...there truly is nothing other than unfamiliarity to be afraid of, and even that will pass in time.
With love,
Petrus