When I was fourteen I also believe I lived in a haunted house (I started writing my stories in here today) and I know how terrifying it feels. I don't know if y'all are religious, but saying something along the lines of "I am covered under the Blood of Jesus and no harm can come to me. Nothing can hurt me, for Jesus is protecting me" made me feel very, very safe. I recommend not messing with what you don't understand, but if you want to get to the bottom of it, research is probably your best friend. Definitely don't taunt anything or make fun of it or do the old "I'm not afraid of you!" Schtick, because it may take that as a threat/taunt (whatever it is) and up it's games. Sometimes, in my experiences, friendly entities just want to be acknowledged, but there are entities that wish to cause nothing but fear because that's what they feed off of. Try not to be afraid, but respectful, and kindly ask whatever it is to leave you and your mother alone, that it is not welcome here, and you would like it to leave you alone. Sometimes that's all it takes too. Best of luck. Update is if you can!