Could I have anxiety?

Dear Ask The Doctor: Recently (over the past two years or so), I've been quite nervous or scared to do certain things like, shower when no one's home, leave my room when it's dark. I'm fourteen and I've had four episodes that seem like panic attacks - all lasting around 20-30 minutes. Sometimes, I'll get very nervous or scared, I'll have symptoms of these episodes, but it doesn't get as bad as the four times I had those episodes. It usually starts with getting dizzy and shaky, then a racing heartbeat and from that it just turns into a full blown episode. I looked online as to why I salivate so much and one of the reasons were anxiety - I know not to fully trust that, but it's been concerning me since the first episode I had a month after I was thirteen. I'm terribly sorry if this is all hard to understand, I'm not best at describing something like this to someone. Could this be anxiety or am I just making it up in my head and it's really no big deal?

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