Are there ways to test for electro-sensitivity?

There currently are no defined ways to identify or "diagnose" electro hypersensitivity. A few medical doctors and researchers have, however, published scientific studies and guidelines on how to identify EMF-related illnesses. One of the best document that has been published on this topic is the 2016 guidelines from the European Academy for Environmental Medicine (EUROPAEM): https://www.degruyter.com/document/doi/10.1515/reveh-2016-0011

This document recommends various tests that can be done to get a clearer idea of how EMF-"sensitive" someone might be.

This second document from the French organization ARIEM is also a great resource to share with your physician:

A practical guide for physicians in the management of patients suffering from

electromagnetic hypersensitivity and/or multiple chemical sensitivity

https://theemfguy.s3.amazonaws.com/EMF_Research/ARIEM_EHS_MCS_Guide.pdf

Finally, I've compiled a list of EMF-aware physicians who can understand your condition and help you get better:

• Dr. Neil Nathan (offers online consultations)
• Dr. Eric Gordon from Gordon Medical (California, USA) 
• Dr. Stephanie McCarter and the team from Deeper Healing (South Carolina, USA)
• List of other practitioners recommended by Dr. Neil Nathan
• Members of the American Academy of Environmental Medicine (AAEM)
• Members of the National Association of Environmental Medicine
• Members of the Physicians' Health Initiative for Radiation and Environment (PHIRE Organization)
• Members of Physicians for Safe Technology