Demons and evil forces do exist! I have to testify that I have had several first hand encounters with them in the past. I would have many strange phenomenon occur in my house. Lights would turn on by themselves, the oven alarm would go off by itself, one time the light bulb in a light fixture popped out by itself and flung to the floor. I used to dabble in the occult when I was a teenager, but after I became a Christian I threw all that stuff out the door.  
 
The worse night I can remember occurred just a few years ago when I was home alone at night. In the middle of the night I woke up in ABSOLUTE TERROR. I felt that there was an evil presence in the house and at the same time I felt like my life was in danger. The best analogy would be the feeling of absolute terror coupled with the fear that I'm in danger and am about to be murdered. As one previous poster had said, a feeling of "overwhelming sense of doom". About a minute or so after I had waken up feeling this evil presence and terror, I had heard the knob on the bathroom tub fall down, the toilet seat fell down, and the door to the bathroom banged a few times. Since I couldn't pray out loud I had prayed in my mind that God would put a hedge around my home and cast the evil spirit out. Sure enough after a while of continuous prayer I felt a sense of peace. However, right before I was about to fall asleep again, the phone rang. (I never get crank calls in the middle of the night) I had picked up the phone but no one was on the other line. (I feel that this was an indication that the spirit was out of the house, yet trying to harass me through some one else's phone) After this incident occurred and I prayed very hard for God's hand of protection I have never been bothered again.  
 
There were signs that lead up to the attack like an increase in paranormal activity my family and I had witnessed within the house. But unfortunately we ignored those signs. A couple of times I used to wake up in terror feeling an evil presense and I used to dismiss them as being bad dreams... However, after this one single event happened which was coupled with physical disturbances within the house, I feel that everything in the past that occurred were really warning signs.  
 
Nowdays I have never had a single incident occur. I never wake up out of sleep in terror and there are no more physical disturbances that occur within the house.  
 
For those who are experiencing similiar problems or believe that you are cursed, the solution is a matter of the spirit. You need to dedicate yourself fully under the Lordship of Jesus Christ. You also need to fully REPENT of whatever you are doing that may be causing your disturbances. If you are involved in the occultic realm you need to get rid of all types of occultic objects in your house (ie, ouija boards, tarot cards, runes... etc). Do not consult with psychics, tarot card readers or anyone that has anything to do with the occult realm.  
You need to continue seeking after the Lord and continue to pray for deliverance. At the same time it would be wise to find a well balanced Bible believing church and contact the pastor and elders to let them know of your situation. Have them pray over you. Unfortunately there is no alternative solution. Reading the Bible and displaying crosses in your home aren't going to work unless you have a willing spirit that desires to truly walk with Jesus Christ. The goal of these demons is to keep you under their control and bondage and nothing is going to work unless the attitude of your heart and spirit changes.  
 
Unfortunately demons do exist whether or not you believe in them.