Hi Alison,
Don't go rushing into anything too hastily - it could just be a temporary disturbance in your general being. Have you changed insulin lately?
Do you have any other physiological changes that you ought to consider?
Best to discuss with your D-care team (if you have one😱) to see if there's an under-lying cause.
In the meantime, keep checking before you drive. Probably best to reduce the time between tests, whilst driving, from the usual 2hrs to (say) 1hr, if only to maintain your confidence. If you scare the DVLA into suspending your licence, possibly unnecessarily, you will not only have the inconvenience of not being able to drive, but expect insurers to like you less when you are in a position to resume.
Can I also suggest that you take great care when discussing with others - being truthful isn't the same as blurting out all your worries to officialdom. A perfectly healthy (non-diabetic) friend of mine once had his licence revoked for a year, after his own GP wrote to the DVLA behind his back, following a solitary dizzy spell!