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High sugar levels promote infections. So, keeping your sugar level in check should solve the problem.
Other thing you can do is to prevent reinfection from your clothes. For that I suggest you only wear cotton underwear as synthetic ones promote infection.
Make sure you wash your underwear especially the ones which are infected with Dettol solution and dry them properly in sunlight before use as dampness also can promote infection.
Also use feminine hygiene products such as V wash (vaginal wash) daily while bathing. Also take tablet Fluconazole 150 mg once a week for three weeks. Drink 8 to 10 glasses of water.
If you still have itching or discharge again then we can suggest you local vaginal treatment.
For further information consult an obstetrician and gynaecologist online --> https://www.icliniq.com/ask-a-doctor-online/obstetrician-and-gynaecologist