Hello Dear
Warm welcome to Healthcaremagic.com
I have gone through your concern in depth
* Might be in relation with changes to thermal homeostatic mechanisms
of the body through antibiotic mediated way
* Will be almost impossible to get detected in blood tests , rarely
presence of atypical
antibodies may be found in some instances only
* Mapping of brain activity in concern with exposure to
cold /
temperature changes in highly designed advanced laboratory set up
may reveal some clues at research levels
Hope this will help you definitely .
Feel free to ask any further queries .
Thanks for patience evaluation of my answer .
Regards .