Sounds to me like a yeast infection. You can get Monistat over the counter for it.
Sounds as though you have thrush. This is where you will experience itching and sorenesse at the opening of the vagina and the vagina may also be painful when you urinate. The liquid is vaginal discharge.
If this is the first time you have experienced this then visit your gp. Otherwise, you can also visit your pharmacy who will be able to provide medication.
Without more description, I couldn't tell you if this is normal discharge or possibly some sort of infection. I would suggest going to see a doctor in case it is the latter.