Andreas will give you good advice. What i'd do in the meantime while waiting for him, (and this is just me) would be to simpley-- like a child--- plead before God and ask Him to get these entities to move out of you. Then ask God to make your spirit and soul a place where no entity will choose to lodge. I know if it happened to me, no way in heck would I have any ability on my own to get them to leave. If an entity wants to stay inside you, the're just going to do what they want and laugh at your requests to leave.
All of these entities who have rejected God hate a vaccum or void. They have to be inside something or someone. It's never wise to invite any entity inside of you- even if they seem nice and sympathise with you. They are very cunning and know how to appeal to human weakness and our egos to achieve their goals.
I dont judge or scorn these entities. We humans are no better ourselves and have our own issues. You may pray to God for these entities that one day they may come back to Him. Sadly, you praying for them out of sincere love may just drive them out- because opposing energy hates positive energy. Too bad they wouldnt just bite theyr'e pride and come back to God like the Prodigal Son in the scriptures. After all, we are all prodigals- no matter who.