Could it be hyperventilation?

So I think I might have hyperventilated a few hours ago. I was watching a show that was scaring me and I was babysitting. That really put me on edge. I got really nervous. After being anxious for about 30 minutes I was short of breath and my arm felt weird. It still feels weird. It doesn't feel numb or tingly, it just kind of feels like it isn't there. It's a really weird sensation to describe. Help! I'm freaking out.