That's funny, Cofty, beause I was going to show through Prodigal's post above that there was a 2nd definition of spirit. ("energy, as everything is energy"... and if I can presume a little bit; perhaps PS also means that energy holds our thoughts, emotions,values, personalities, nature, etc... the person we are on the inside)
LizLA - I would do both sets of advice given to you in this thread. Tell the spirits to leave, quell my desire for them to remain (because of what I got out of it - psychic power); all of which you might be able to do by asking Christ to help you... and I would also see a doctor about a possible physical problem; if only to rule it out.
Although I would go IMMEDIATELY to a doctor/er or whatever, if I was being told by 'spirits' to do harm to someone or something else; especially if I was tempted even a little bit to listen to 'them'.
Peace to you,
Tammy