Another Thing To Be Bitchy About - The Room-mate

I don't know if I'm over-reacting, so I'll just lay down all the facts.

• Once when I went back to hall, I found her stuff on my fridge. She's never asked me and she keeps drying her utensils on top of my fridge which is ridiculous.
• Once, I found her t-shirt on my bed.
• Today, I found one of her letters on my table, and the plug to my laptop was disconnected.

Is she like using my table or something? I only hope she doesn't have people over sleeping on my nice clean bed cos I'm absolutely anal about hygiene.