Paranoid.....

hi hi has anybody experience the paranormal? I have extreme health anxiety that I deal with every single day. but I'm dealing with a new one today. just a little while ago while laying in bed I felt a scratch on my arm I turned around really quickly and didn't see anything in there and nothing there to scratch. there is no scratch but it felt like something touched me. I've lived here in this apartment for 5 months now and have never experienced that before and of course my mind went directly to negative thoughts and thinking the worst. I need help coming with the realization.