I’ve experienced that physically under my sheet, so I know a few things about that manifestation. But she wasn’t malevolent at all, when it happened. You should know that a darker manifestation isn’t equalivalent to “evil”, right?
What if your experience is something you just have to go through to move forward on your relationship with the succubus? An experienced magician should go through all kinds of energies and it’s manifestations, just to simply know the differences of it, and it will make you stronger and resilient when other magicians or spirits try to fuck you over.
…or maybe she’s working with your chakras and open up the portals to the astral plane:
The “needles” could be the connection that makes it easier for you to astral project, just by simply focusing and closing your eyes.
It is said that chosen one’s will get the full spectrum of their future spirit spouse. It can be nasty and intimidating at times, but it’s honest and truthful. It also makes the bond stronger.