Can you be attacked by something in your mind? Of course, your subconscious mind can work against your conscious mind. Sometimes it can be very violent. Personally, I would recommend talking to it. If you were my student or client, I would guide you into trance and we would all have a nice little discussion, you, me and 'it'. If you do not have a good hypnotherapist or psychologist I would recommend going back down into your meditation and seek it out. Remember, it is a part of you, so it only has the power that you give it. It is possible for other things to attack you when you are in a receptive state, but that is very rare. (Some people will say that those 'other things' are still only part of you. They may be right. That discussion is for another thread.) Just to make sure, I would open the temple/circle before going in to confront it. It never hurts to be safe.