Thumping/Threatened & Scared

Things started happening not long after I got back & settled in watching tv. Heard loud thumping coming from Nathaniel's room(Lottie & I are only ones home),then I heard about the same noise coming from on the porch,looked, no one was there. Continued back to watching tv and heard the thumping again over & over,upstairs,porch,downstairs & then I heard what sounded like a big ball being bounced loudly,looked, nothing there. When all this was going on I did not get a good feeling at all along with it,sorta threatened/scared type feeling and I felt as if someone was going to come down steps from upstairs or come upstairs from basement.