Of course, docs are crazy happy if a patient googles anxiety and then self-diagnoses.
Don't knock it till ya try it LOL. Seriously I am diagnosed with General Anxiety Disorder since 1994. It was only through the internet and careful searches vs medical history & symptoms that I actually found out what was wrong and causing it. No doctor could tell me. Once I told them and explained it they looked it up and agreed. Understand the origin and how a disorder works increases your skills to adjust to it.
In my case it's multiple issues mainly caused by sensory processing disorders. IOW several Vestibular and sensory related problems which anxiety is a symptom or cause and effect from the other. A such I do not have General Anxiety Disorder as was first diagnosed.
This also makes a huge difference in medication approach. For example No antidepressants can help this but rather can trigger Serotonin Syndrome because of the neurologial damage involved. It only makes matters worse as it maxs out an already damaged sensory processing system. Believe me Shrinks do not know this.
My wife may have died had I not went on line with her meds +adverse reactions and told the doctor it was Serotonin Syndrome she had. Six doctors and two hospitals didn't catch it.
The internet is a valuable tool for learning about disorders. Care should be taken though to use reliable sources. Mayo is one of my favorites as is VEDA.org or Vestibular Disorders Association. I also in all this found out my sensory processing issue trigger a form of Epilepsy called Myoclonic seizures triggered by sound mainly and some visual circumstances. Again no answers were coming from my doctors. No cure for any of it but hey at least I know and have a basic understanding of what is wrong. That means a lot to some persons.