Xanax takes the edge off the anxiety. I have what is called Pure O which is a type of OCD where I have horrific thoughts pop into my head at weird times and scare the living crap out of me. I used to have panic attacks as a result of the horrible thoughts, but I am getting better. Anyway, you said something about seeing a rash that isn't really there. Do you know that it isn't there and just worry that it is, or do you actually see a rash? Big difference between the two. Is it more of an obsession or is it an actual rash that you see an nobody else sees? If you actually do see a rash then it is a hallucination which changes the game a little, but if it is just a fear of a rash even though you can plainly see there isn't one there then it is an anxiety disorder and Xanax will help.
You said it got worse after the birth of your baby. I would go see an anxiety disorder specialist and see if you can get a diagnosis and then go see another one and see what he/she says. Never trust the first opinion and make sure you are 100% truthful when you are being asked questions even if you are horribly scared of what the doctor may think. It is essential to your diagnosis. if you don't you may end up with a wrong diagnosis and the wrong meds and you could potentially end up feeling worse, so tell the truth.
I quit smoking, drinking, and caffeine because all of these made my symptoms worse. I also meditate daily and exercise a few times a week. The exercise and meditation really help a lot when it comes to anxiety. You can start by making these changes if you haven't already and then get to a doctor who specializes in anxiety disorders and get an evaluation.
I hope you feel better,
OE