Dad accusing me of stealing

My dad is collecting dollar bills and I guess he counted them and it wasn’t the same amount that it used to be. He called me at work and chewed me out for stealing from him. I tried to explain that I didn’t and then he hung up on me. I got home from work and he ignored me, so I went to my room and part of my room was messed up. I don’t know what to do. It’s just my dad and I that live together. My mom and sister live in a different state. I feel really bad, even though I didn’t do anything. I’m hurt that my dad would accuse me of something like this. I’ve never stolen from him before.