All Beliefs are Welcome Here!
I wouldn't be too worried unless the scratching continues. Many of us scratch or scrape against things and think nothing happened, but later we see marks and wonder where they came from. As for the fan, I'd start videotaping it and make sure it's doing what you think it's doing. Check your hearing. The breathing you hear may be your own.
The more stress you are under and the more negative you feel the more that can manifest into a spiritual energy. It's nothing freaky or crazy! It happens to me as well. Take a shower,run garlic salt water over your entire body. When you finish wear something white for purity. Take sprinkle some garlic salt around the perimeter of your home (front, back, sides, car, etc) Go back inside and cut up some cloves of garlic and place a small sliver over each window frame and door frame of your home. Go to your altar, get five white or black candles and place in a reverse pentacle. Call upon your guardians and let them know you need assistance in banishin negative energy from your mind, body, soul, and home, light the candles in a counter clockwise manner, and burn some sage/sweet grass (a bundle) in a counter clock wise direction starting in the south , move west, move north, move east, and end in the south. While you're moving in a counter clockwise direction while smudging your home with the sage/sweetgrass bundle speak the following: "Guarduians of the watchtowers of the North, East, South, and West. I call upon you and invite you to join me in my quest to rid myself and my home of the negativity surrounding me which has manifested itself. I'm asking for your assistance in taking the negative energy with you when I dismiss you". You can chant whatever else you want to rid yourself of this negativity. When finished, dismiss the guardians, let the sage/sweet grass bundle burn to ash. (You do not want to re-use it due to its prior use), blow your candles out in the reverse pentacle form. Be sure to cleanse all items used in salt water!!!
You really cannot go wrong cleansing the room with salt and water (Holy water you make yourself) and frankincense. After my mother died I went around her house 3 entire times with these (first the salt water, then again with the frankincense) and I could feel that she was gone. Always start with basic house cleaning. If that doesn't do it, then, yeah, I would find a reputable psychic to check it out. But do your housework first!