Hello, this is Dr. Love. I will be glad to assist you.
The other expert is correct that the tests that you have had are reliable in excluding the diagnosis of HIV. The current generation of HIV tests are very sensitive, and there has never been a documented case of HIV that would not have been detected by this period of time.
As for the anxiety, there is no single correct answer. You are correct that the Aropax/paxil and Lexapro are both SSRIs. The reason for changing to the Lexapro is that it is only the form of the drug that is active, so has less side effects. Organic compounds exist in two mirror forms, which are referred to as right or left handed. Usually, only one of these forms is providing benefit, but both form can cause side effects. The Lexapro has only the form that provides benefit. Of course, there is no drug that never has side effects, but the Lexapro is usually better tolerated. Therefore, it is reasonable to continue the Lexapro.
If the Lexapro is not effective or causes side effects, then it would be better to change to a drug from a different class, such as an SNRI, e.g., venlafaxine.
If I can provide any additional information, please let me know.