Yes, approach as teamwork and be humble about what you bring to the table, making it clear you are aware that you are a layperson, and that you are also not the first to go off and think you've found something googling, after that I brought spreadsheets to my appointment, summaries of abstracts and links together with the protocol for the test I believed I required. Eventually, after one GP moved on to study drug gene interactions and another retired I was able to get the gene test I had hypothesised may reveal an underlying cause and I was correct.