A Negative Entity, any spirituality buffs able to help?

Before jumping to supernatural/paranormal/new_age conclusions check first if you're drunk (alcohol), high (weed, drugs). Since you are "juiced", you fall on this first step.

If you're skeptical about the juice being the culprit then see a doctor and get your blood checked for drugs and that sort. If it comes out clear then move on to the next step.

Visit a psychiatrist. These folks can do wonders and will help you pinpoint the cause of this episode. If that doesn't work for you then it could be evil spirits.

Then again, if you're Christian, you probably know that evil spirits are too busy manipulating the people in power and have no time for the average joe like you and me.