I've had an MRI of the brain, spine, and an EMG, as well as detailed immune and disease blood panels. There isn't much I haven't tested since.
In addition to the symptoms I mentioned, I had cognitive deficiencies that began in the days following the contrast MRI as well as the onset of insomnia. Weeks later, the cognitive issues were acute with delirium but have mostly resolved over the two years since, but a debilitating insomnia persists and has made life very difficult. I slept in a sleep lab but there is very little that can be observed and is known about sleep.
So yes, the contrast MRI for pain and swelling on the roof of my mouth that turned out to be tooth related changed my life.
The research on this is slowly revealing the mechanisms that cause the contrast formulation breakdown in the body, on the interactions contrast molecules have with calcium nerve receptors and iron. Alternatives to extremely toxic gadolinium are being developed. The contrast is well tolerated by most people, and circumstances in which it affects some, who are otherwise healthy, haven't been elucidated. It stays in the body in small but above normal amounts for years. Doctors are ignorant of the risks, and there are no treatments.
If your symptoms began in the days following the contrast MRI, you may be one of the unlucky ones.