For the last two nights in a row, I've been waking up in the middle of the night, (I usually fall asleep around 10-11 PM) and seeing spiders crawling up my wall as well as my head & feet, although my chest and legs are clean of them. I'll get up, and normally throw the covers off and run into the bathroom, which is just one door down, and kick and rip my shirt off. (I've ruined 2 good shirts this way -.-). Then to realize, It didn't really happen.
This has happened in the past, but very rarely. Now it's been about every other night for a month, and now I've had them two nights in a row.
It's beginning to become annoying, and a bit scary at nights when all the lights are off. They are so real, I can actually feel them on my feet, and crawling on my head, although I swear they aren't real. Sometimes I am frozen in my bed whilst they crawl on me. (Which never happened before, but happened last night). I do not know what is causing ths and want to really get to the bottom of the situation. Can anyone help me with this problem that I am having?

Any help will be appriciated.
Thank you,
-Derek.