Is it really a ghost?

long story. my 2 bes frends experienced ths yestaday & i wasnt there =[ neways. here: my friends, lettuce & ichigo were walkin around the block when ichigo started to talk 2 herself. Lettuce asked who are you talkin to? ichigo said tht there was a voice in her head. lettuce ddnt believe her so they went back to lettuce's house to prove it. ichigo swore on their friendship & bible & family too. So lettuce told ichigo to prove it. lettuce counted to 3 & something touched her hand. then she made sure no air was blowin from the vent and she told it to move the curtains. they did. then she asked it to go in HER head. all of a sudden she got a headache. so they went to karate and lettuce told the ghost to hide her necklace. it was on the kitchen table whn she left. and she made sure ichigo ddnt do it by watchn her. after karate, lettuce looked everywhere cuz her necklace wsnt ther. aftr an hour, she lookd & it was undr her pillow! should i belive them?(thts not ther real names i jus usd it