To experience rapid onset temporary phobias?

Alright, so, since I was young, I have always had a phobia of spiders, But recently, I have been experiencing sudden periods of temporary panic from phobias that come and go on a nightly basis, different each time. For example, its currently 5:00 Am, I am not asleep because I have started to believe that if I close my eyes for too long, invisible entities are going to tear me limb from limb. When I think about it, its clearly irrational... but, try to close my eyes, and sheer panic forces them open against my will. I also keep seeing black masses out of the corner of my eyes, but this may be sleep deprivation induced optical illusions. Still, I cannot shake the feeling that something is causing these sudden nightly phobias. Who knows, maybe tomorrow night I'll become terrified of chicken wings.