Hi Thia, welcome to the New Age forum

Tingling can be a sign associated with chakras opening. I often experience it at my crown chakra. It shouldn't be unpleasant, though it can be 'tickly'! I'm pretty sure that this is nothing sinister at all- psychic invasion doesn't feel pleasant!! Cords don't normally tingle.
I think Spidey senses sums it all up beautifully- it is your third eye opening ready to receive info!
Love your Avatar by the way!