A Head In The Fireplace And Other Hauntings. I Need Help

I’ve lived in the same house all my life. I’m 16 in a few weeks. I am not an expert on these sorts of things like you guys seem to be after reading some of your stories so bear with me, as I’m not very knowledgeable on the subjects of ghosts/demons and things.

My house is pretty old, about 80 ye…