yes brother, don't stress

do not be tempted by giving easily into darkness. Because, if there are higher things out there and you're starting to have contact with them, wouldn't it make sense they test you to see what kind of person you are? Always remain skeptical of the things that you are told.
I remained calm and relaxed during (almost) all of my encouters while you are describing a chill going down your spine (that was also the case with me in the beginning) but since then i've experienced the most intense feelings one can imagine cutting straight through me, multiple cold shivers licking my body like a cold blue electrical fire baptism (that was a very puwerful moment, i just walked into a church at random, i wasn't even tripping but the air started vibrating/breathing out of nowhere like i was)
satanism is just a ego-centered form of religion, using the higher powers to fufill the personal ego desires. it's pretty much that whatever goes on in your mind attracts that kind of entity's (do you have higher goals/morals or are you just trapped in personal needs?)
if you feel uneasy, read up on the negative entity section in the wiki. Visualisation is a extremely powerful tool in healing and protection (combat)
but above all, remember that this whole world might just be an illusion made so we can enjoy ourself