I usually do guided Internet searches to seek assurance that my condition could be benign. As well as HA, I have GAD and IBS so I will usually put those terms in along with whatever symptoms I'm having and I come up with loads of hits that tell me my dizziness or chest pain could be caused by IBS or GAD, rather than a stroke or heart attack.

Most symptoms are common to lots of diseases so I find it best to try not to explore too deeply.