Negative Attachment

I've been struggling with a negative entity attachment for little over 11 months now, it came to me one night and never left. I was foolish at the time and invited it in thinking it was a positive thing. It was very sexual and we had some relations I'm ashamed to say. At that time I thought it was fine but after the first week I started to realize this thing was not good. It wouldn't leave me alone, for the first two months I was getting maybe 1 to 1 and a half hours sleep because of the harassment. I felt this intense spiritual pressure all around me all the time and felt nauseous, it like what id imagine someone with claustrophobia to feel like in a closet only my aura felt infected by this thing if that makes sense. At some point it actually felt that someone was hanging on my back, weighing me down. My dad picked up that something was not right and phoned a friend who is a healer. She said it was a thought form entity and we removed it but it is still hanging around. She did somehow make me a lot more resilient to its influence. From a medical standpoint I am on sedatives which help a lot, and I have epilepsy (Not sure if there is a link). I'm not sure entirely sure if its a spiritual problem or a some kind of hallucination cause by some epileptic activity.

After those two initial months I have been much less disturbed but it is still around, I have had very strange dreams which I don't normally have including lucid dreams with or without sleep paralysis. Most times when I feel the presence it is a touch sensation ranging from a light touch like a breeze to a a definitive grab by a real person. I sometimes see a floating transparent orb like the ones you get when you look at the sky but only bigger. At night there is sometimes an orb that floats above my bed but it is different almost like a film grain effect. I also see shadows with no one there. I can somewhat see auras so its a similar to the after shadow you see from the aura. One after shadow I saw the other day kind of looked like a face, it was creepy. Also when I start to feel a presence most times I will also feel pressure on each side of my head in the temple region but more towards the back of the head, I get a similar pressure sometimes when I meditate or pick up on a vibe of some sort.

Has anyone else had any similar experiences? Is there any thing that I can do to get rid of this thing for good?

Any advice or stories sharing would be much appreciated.

Thank you and sorry for the long post.