itching/stinging and applying nappy cream?

Hi,
Welcome to ehealthforum.
The symptoms of altered vaginal discharge along with vaginal discomfort and itching, could suggest vaginal infection. The exact cause can only be made out after careful evaluation. Consider visiting your doctor/gynecologist at the earliest for thorough examination and further evaluation (including vaginal swab/smear test done on the discharge) to look for the underlying cause for the symptoms that you describe. Treatment as needed (based on examination findings and investigations results) would be started to help you control the symptoms. Avoid vaginal douching, or use of harsh soap or perfumes in the area. Use loose cotton undergarments and avoid use of tight fitting clothes. Be in regular monitoring and follow-up with your treating doctor/gynecologist and report any new/abnormal symptoms immediately. Drink plenty of water. Take adequate rest. Maintain healthy diet and lifestyle.
Take care.