Is it excessive that I don't want to use this bedding?

Instead of putting the clean bed linens directly into the linen cupboard, my parents always left the bed linens in a laundry basket on top of the dirty laundry pile for days, where a corner might have hung down into the dirty laundry.

I only noticed this recently, though, and I just had this bedding in my bed. I just feel like clearing out my entire bed, throwing everything in the laundry, and taking a shower. Is this excessive?

By the way, I tend to have a fear of contamination and therefore need the opinion of "normal" thinking people.

My thought process is basically: I'm lying in bed -> bed full of germs because of the bedding -> I get up tomorrow -> go to vocational school -> bring disgusting bodily fluids and germs with me to vocational school.

I don't really want to take a shower or make my bed (I've already showered three times today) but I need to know that nothing can happen.