What is the consistent screeching in the ceiling of my apartment? Sounds like nails
So I have moved into an eight story apartment building built in the 60ish time era. I have lived here a month and every single day I hear a screeching, nails on a chalkboard sound, like a kid twisting on a rusty swing ALL the time. I said something to the leasing office and they said it sounds like the piping. I have talked to numerous other residents and NONE of them have experienced this problem. Only myself. I hear the noise mainly in the bathroom, especially late at night. The woman upstairs seems to run her water a lot. I have gone to her apartment three times but she refuses to open the door. I really need to know what is going on. My ears are starting to ring and I am going to lose my mind. If anyone has any ideas what this could be it would help a lot. I live in Raleigh NC. So its neither too hot or too cold here. The average temp for the month I have lived here has been about 50. Please help:(