Seeing a developmental pediatrician for my son when he was younger to be diagnosed with autism spectrum disorder.
Seeing a rheumatologist to discuss ramifications of the HLA-B27 gene and the family history of spondylarthropathies.
What's the common thread?
See a doctor when you have any health concerns, physical or mental, no matter what others may tell you about it being a waste of time. And not Dr. Google, M.D., but a doctor that you trust. Google their credentials, sure, but don't google a diagnosis.