Never had a vestibular assessment. I doubt I need my crystals reset. My understanding is this is needed when vertigo is presented. I've never experienced a spinning sensation. Only dizziness.
I realize potholes do not cause concussions. What I was trying to say is if you are in recovery mode it may trigger symptoms. This is called second impact syndrome. Could be very mild or fatal.
I'm currently in the midst of a relapse. Two falls within 2 weeks. Both falls landed me on my right hip and right arm. No head hits. No symptoms after first event. Right after second event I walked into a museum and after a few moments I felt mentally overwhelmed. I've had mild symptoms for the last 12 days, dizziness mostly.
I'm a regular biker and have stopped. The trail I bike is very bumpy and seems to make symptoms worse afterward. Normally it doesn't bother me.
So yes, I would say that potholes may trigger symptoms, did for me.
And since I assume most readers are recovering from head injuries I advise caution.

That pothole IS NOT second impact syndrome.

Second impact syndrome is a potentially deadly condition where the brain has not yet recovered its ability to regulate fluid pressure within the skull after a previous severe concussion where fluid regulation was seriously affected. The prior concussion would have included prolonged serious headaches and other serious symptoms. The new concussion would cause a cascade of fluid pressure disregulation that can cause the brain to herniate into the brain stem or suffer other life threatening conditions.

Your issue sure sounds like neck instability and whiplash. Both whiplash and concussion cause the same or very similar symptoms.

Vestibular disturbances do not necessarily cause a spinning sensation but they can cause dizziness.

Biking a rough trail can easily disturb the crystals, especially with the head tipped forward and to the side. I have had multiple vestibular disturbances over the years, twice this past year. Both were in different parts of the crystal. One time, I was crawling under my motorhome and bumped my head as I was looking to the side. It was an instant dizziness.

First of all, thanks for your opinions. It's good to hear other perspectives.
I agree that my latest episodes were whiplash events. Both impacts were falls onto right side, no head impacts. The second fall happened two weeks after the first and was much milder than the first. The first was a hard impact with all my weight. I think damage was done on the first fall even though I had no symptoms. The second impact, although mild, triggered symptoms. I'm speculating because the first was still healing. Dizzy, disoriented and headaches. And a telltale feeling of pressure inside right temple which is the side I fell on. It's been over three weeks now without improvement.
Trying to be patient but it's worrisome. I had PCS in 2014 for 15 months of misery. Nothing worse than a brain injury!

"The first was a hard impact with all my weight. I think damage was done on the first fall even though I had no symptoms. "

This idea explains your biggest struggle.

Damage without symptoms.....