Zoning out and feeling of not realness, bug crawling like feeling on body too?

I dont know whats going on with me and im 16. lately i have been felling like somethings dont feel completely real. I feel like im zoning out all the time now. It is hard to concentrate in school. I have been getting okay sleep lately, nothing too out of the ordinary. Then the last couple days it feels like there are bugs constantly crawling on my body. It is not bed bugs because my parents checked my bed one night when i complained of feeling itchy. It might not be lice since my dad checked me for lice and found nothing. I need help because i can not find anything and it feels like im going crazy