What Causes Sudden Sensitivity In Hearing?

Yesterday morning I woke up to sensitive hearing. Everything was extremely loud even though it was quiet. I just figured my lack of sleep due to my newborn was affecting me. Well, it never went away. It has since worsened to where I hear robotic tones in my own voice and anyone who talks to me. I've had headaches the past few days. I haven't been in any pool of water, so I don't know what this is. Any idea?