Did I have an illusion?

Last night i was laying in my bed, and i happened to look over towards my door, and i saw an young woman come into my room, over my head grab something off my shelf, and leave. call me crazy but i swear my room/house is hunted. They said a old woman died in my house, Mary Taylor, What a quinkadink... my last name is Taylor too. Last night as i seen this ghostly figure... i jumped out of my bed turned my light on and nothing was there. About a year ago or less, i had my bed by my closet... i had just rearranged my room, And was getting ready to go to sleep. About an hour after falling asleep I woke up to feeling like i was being watched. I thought my mother was in my room, but she wasn't, i was alone... i was so scared i didn't know what to do, i hollered for my mother but she never heard me, i was so scared to move. Than i turned my light on and tryed to fall asleep, But never got to sleep that night, ever since then i have always felt like I'm being watched, but last night was crazy.