carika,Every drug we take will cause a different response to each individual. If you are starting to feel better on the Paxil that means it is working but as others have stated it usually takes 6-8 for the full theurapeutic dose to take effect and no it is not a sudden change you notice. It is more a case of you just feel better and forget to notice your not so anxious.
If you feel you need to move up to the 20 mg dose, do discuss this with your Dr.
Kindly,
Kitt