I can only reiterate Karin’s comments. Your education and experience should support the suggestion that an evaluation by your physician or PT would be advisable to rule out any underlying conditions that may be aggravated by continuing your routine.
The ergonomics of your driver’s seat should definitely be considered. Perhaps a lumbar support, as Karin suggested, if you’re not using one, would be worthwhile consideration. As you know, your posture while driving is also most important.
In addition to the low back/core strength exercises, I would recommend that you include a daily stretching routine that includes stretches for lower/upper back, chest & shoulders, abdominals, and hamstrings.