Anxiety can cause us to over examine our bodies to the point to where we will eventually find something wrong with us.
You could simply have a little and your anxiety is kicking in.
I'm actually going through the same thing now. I have a fever, but My anxiety is telling me it's something way worse and more serious.
Try to not over examine yourself and stay busy. I never thought I'd be saying this, but try some hot tea, soup, etc.
Are you doing anything to address your anxiety?
Yes I over examine myself so much, but can anxiety itself cause your body to do this? I've never taken any meds not that I don't believe in them I just think for my own self I can over come this myself