What has been going on in your life that is stressful? I would begin a journal. Write down what has been happening in the last few months. Include good things and bad. Things that are bothering you. Maybe some past issues that you've been thinking about or are affecting you today. You need to discover what is causing these attacks.
Personally, I wouldn't go out and get medication right away unless it was something like an anti-anxiety drug such as Ativan or Xanax. Those drugs you can take just as needed. I take Ativan every once in awhile, I don't feel weird on it. It doesn't make me sleepy. I just have less anxiety.
You may not need a long term anti-depressant. I'm not a doctor, I'm just going by my experiences and the knowledge I have gained about panic/anxiety attacks. Once you find the reason behind your anxiety, you may be fine. So, a long term med doesn't make sense (at least not now).
If you need help determining what's causing your anxiety, I would make an appointment with a psychologist. Cut out caffeine and junk food. At bedtime, don't sit and wait for the attacks. Distract yourself with a good book or your journal. When the attacks do come, use positive self talk and relax. Calmly relax. You can e-mail me if you need any more help!
Anxiety Disorder/Mitral Valve Prolapse
Prozac and Carvedilol