Just like everyone else has already said it can take between 2 and 4 weeks for most anti-depressants to work.

When I was taking lexapro it took close to 3 weeks before I started feeling better myself.

Just hang in there and take your anxiety medication as needed and you'll start feeling better. Until then just take it day by day.

Of course if you aren't feeling better after a few weeks you should get back with your doctor and he'll probably recommend a different medication or dosage altogether.