Obviously, you are under a ton of
stress right now, and in my experience with anxiety and
stress it can make us feel both emotionally and physically spent.
SSRIs like Celexa can take weeks for you to feel it's benefits. In my experience in taking medications like these, I usually notice side effects for the first few weeks or so and they eventually subside. With me, it took a good month or so start to feel the benefits of the medication.