Hi and thanks for the query,
it shall be very interesting once more to redo the blood glucose
levels for the diabetes
. Its worth signaling that diabetes favours the growth of germs that are dependent on sugar for nutrition like yeasts. Candida Albicans, which is commonly found in the vaginal region is characteristically one of these germs, and presents with symptoms including itches, compartible with your symptomatology. Other germs like Trichomas vaginal can still present with itches, but however accompanied by yellowish, foul smelling discharge.
A vaginal swab, culture and sensitivity tests could be very helpful. A detailed clinical examination by your gynecologist shall also be useful to exclude local lesions like fissures or eruptions that could still present with itches.
I suggest a proper evaluation and testing in a gynecology setting should be adequate in solving the problem.
Thanks and hope this helps and I wish you the best of health.