How do panic attacks start?

I'm 17 & my mom has bad panic attacks. I don't have any stress in my life but there are times when I feel like my heart is racing & I can't breathe for no reason. Last night, I was watching tv & I was focusing on my breathing & heart rate that I started to panic. Is it possible to have a panic attack... show more I'm 17 & my mom has bad panic attacks. I don't have any stress in my life but there are times when I feel like my heart is racing & I can't breathe for no reason. Last night, I was watching tv & I was focusing on my breathing & heart rate that I started to panic. Is it possible to have a panic attack just by thinking about it or is it more complicated that just that? I have anxiety sometimes & my mom won\'t buy me any paxil help!! in addition, my mom had another panic attack last night ahhh!
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