Hi Elaine,
What is resonating with me from your post is something about decernment - a question about how to sort the wheat from the chaff or the truth from a distortion that is very like the truth.
In my experience there are many places with challenging energies to someone with sensitivity like you and it is possible to work to mitigate these energies. BUT, the big question (other than how to work with/clear them) is whether at anytime, one is divinely given to engage in doing this. The good news is, in a way that, there is never really a right or wrong answer; whichever branch of the path you take will reveal some further unfolding of self discovery but as you tune increasingly to the pull of the soul and feedback in the form of signs and synchronicity the sense of recognising the authentic pull of the soul gets a bit clearer - which is no sense a guarantee that that path will be the easy one.

As to the 'how' of working with clacky energy at sites - have worked in two places with very challenging energy - when I arrived at the place of realising that this was what I was experiencing, I learnt that the journey was like anything else in terms of the process - a balance of meditation, time in nature, singing, dancing whatever made my soul sing and attuned me to that part of me that was not the reaction to the site and daring to soften into what I felt in relation to the site and following the thread - as in the nine step process - to reveal what it was in my system that was resonating with the distortion at the site. And sometimes things pop open to new clarity very quickly but in my experience it takes time working down through the layers - there can be millions of years of karma here so let's not begrudge few months here and there! ;)
Maybe you might feel to explore the feelings you had about the house at night or the feelings of being freaked out when and if the time feels right. It has been days since we worked together so don't forget to be really gentle with yourself - give things time to land -
Here's a link to an article that I feel also speaks to your question
http://www.openhandweb.org Return_of_the_Pleiadians_and_Earth_Energies_Reconciliation.
Thank you for you,
Jane x