Have the ANA repeated and if still +, have an ENA done and also find out your pattern on the ENA. 1:160 is a low positive, but still +.

Xanax is the drug from hello.....it can cause some awful, awful sensations. It has a very short half life and one is almost always going thru a withdrawal. It is not used in the UK it is so nasty. Even at a very low dose, it causes all kinds of physical issues.