Celexa is an SSRI. I haven't taken it personally but I'm afraid to say having tried a couple of other SSRI's and currently taking clonazepam, they're completely different in feeling. SSRI's haven't worked for me, but it doesn't mean it won't for you. And it takes a few weeks sometimes before it starts to work for some people.
I've been on clonazepam for about 2 years now, at a dose I refuse to go higher on at 2mg, but that great feeling you're getting from it now will very likely fade within a couple of months had you stayed on or definitely at least within the end of the year. You really develop a tolerance for it. It still helps me, makes me less nervous, but it's really not the same. Plus it's not something you want to get hooked on. If I go a day or two without it, now that I've been on it for a while, there's bad withdrawal. I'm EXTRA nervous on that day. So getting off clonazepam is no joke if you were an avid user.
What I'm getting at is that it might be a blessing in disguise that you try an SSRI first. Maybe ask her if you can have clonazepam, a limited amount, on the side for special nerve racking occasions.