I'm totally biased against SSRI's for treatment of panic disorder because they're anti-depressants, and as such they are stimulating. If depression is present and it also happens to be the real source of your A/P, then one or more of the SSRI's may help you. My advice would be to talk this over with a psychiatrist. They're better trained and have more experience with these drugs so you're likely not have as much trial and error.
I cannot take SSRIs, so like I said, I'm biased against them. Personally I have had great success with Klonopin, a benzodiazepine. There are dependency issues with them, but they do work for treating panic disorders. Discuss that class of drugs with a psychiatrist as well. They can inform you of the risks and benefits and are more likely to prescribe them correctly if that's the route you choose to take.
Don't stay miserable, though, just for the sake of being drug free or for any other reason. This probably isn't something you can just ignore and you'll wake up with it gone some morning. Go for treatment of some kind, and the sooner the better. Believe me, things can get better.
My Brain: My friend, My enemy: A blog to chronicle my attempt to recover from anxiety/panic disorderanxietypanicdisorder.blogspot.com/