S.,
It is hard when we become accustomed to 'checking' every new or 'off' feeling that we might have. Anxiety has, in a way, conditioned us to attach a red flag to these sensations.
One thing that could help is reading through this link. The process of symptom=anxiety=more symptoms is very clearly outlined here. It may give you some peace of mind to know that this is a common occurrence among anxiety sufferers.
Health Anxiety- The Super Scanner
http://www.get.gg/docs/SuperScanner.pdf
I hope you feel relief soon.
S.C.