thriller day

hye...like everybody did..
go to school...today was freaking me out....guess what??? okay..at class, I feels like I'm going to pee...so Igo toilet by myself..actually this is the first time Igo by myself...then, I feels something like hanging at my back...so I turned around I don't saw anything...so, when I finished, looked at the mirror, then, I heard someone was using the toilet so I like , let them be...nothing to worry...but in my head i feels like... it just me were using the toilet.... so, who is in toilet.....
somebody help me please.........