Should I be worried about her life?

Ok so my girlfriend has been paranoid about ghosts right and well tonight this is still going on I am staying up with her on the phone through the night right now and I am worried for her because her little sister was sleep walking into the hallway about 2 hours ago and well it was creepy for my girlfriend and then about 30 min when my girlfriend was facing the wall her lil sister was right next to her bed then she turned around and saw her lil sis right there and it creeped her out this has been going on until this time and still might be going on and I am concerned because we have noticed a pattern that everytime that she is facing the wall her sister always wakes up thinking my girlfriend is asleep then when my girlfriend tells her sister something she gets back on her bed and sleeps and well it seems to me that she is waiting for her to go to sleep but we don’t know why or what for and I told her to stay awake until everybody is awake..ok so a few min ago the lil sis woke up and got off the bed but as soon as my girlfriend turn around she got back on her bed and went to sleep so I think that yea she’s waiting for my girlfriend to sleep but I don’t know why and my girlfriend also said that when all this started that her lil sis rubbed her left eye and then my girlfriend’s left eye started hurting and then my left eye started hurting,and mines has been hurting for awhile and so has hers and she barely told me that her lil sis’s,hers and my eye started hurting and it was all on our left eye so we couldn’tve been imagining it because she barely told me this a few min ago and that it was too much of a coincidence so what I’m saying what do you think her lil sis wants with her?and why is she waiting for her to go to sleep?also I have heard sounds of a saw coming from her side of the line but she didn’t hear it and that she heard a knocking/hitting sound from my side of the phone line but I didn’t hear so what the fudge is up? Is it a ghost or what is it?