Do you cogitate it is possible to be possessed...i dont but i reflect on i am mortal it?

Do you cogitate it is possible to be possessed...i dont but i reflect on i am mortal it?
As someone who has be mounted(possessed) many times during the course of my spirituality, it is possible.
Yes, evil spirits can create you to lose your mind and to harm your-self or others. A prime example be the killings at Virgina Tech
Yes, it's possible.

(Matthew 8:28-33)
When He have come to the other side, to the country of the Gergesenes, there met Him two demon-possessed men, coming out of the tombs, exceedingly brutal, so that no one could intervene that way.
And suddenly they cried out, truism, "What have we to do near You, Jesus, You Son of God? Have You come here to torment us before the time?"
Now a fitting way rotten from them there be a herd of lots swine feeding.
So the demons beg Him, saying, "If You make us out, permit us to travel away into the herd of swine."
And He said to them, "Go." So when they have come out, they went into the troop of swine. And suddenly the whole group of swine ran madly down the steep place into the sea, and perished surrounded by the water.
Then those who kept them fled; and they go away into the city and told everything, including what had happen to the demon-possessed men.

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You said you feel close to that, then only just pray! Jesus can easily clutch care of your problems!! & I'll pray for you!
Going into an beginning of bipolar or later a psychosis will get the impression like possession. Psychosis definition would fit any demon possession syndrome.
Yes thats way we enjoy stalker's in america.