taytay_grl13, I don't know what the vinigar smell is. Your vagina is acidic for most of your cycle to keep it clean and healthy. Vinegar is also acidic, so it may just be that.
The most likely infection you can have is yeast. The yeast discharge is however white and chunky like cottage cheese. It causes itching.
It is more likely to be normal cervical mucus. Use the google to search the interwebs for information about 'cervical mucus'.
If you are worried, speak to your mom or another ADULT woman you trust.
Take care.