Vagina Hygiene ? Watch
If your discharge has changed, check that you don't have an infection. You can look up symptoms on the NHS website. Alternatively, speak to your GP.
I'd advise against panty liners, because they can harbour bacteria and don't allow air to flow. Cotton knickers are said to be the best.
Most vulvas (the whole area is called the vulva) have a slight smell, though. If it is troubling you, go to a nurse or a clinic. Could just be your cycle, or stress, or you're not drinking enough water. Hope that helped!
If it smells really bad then you might have bacterial vaginosis (not an STI). Have a look on the NHS website for symptoms and if you think you might have it then go to the doctors.
I'm not convinced this is a serious thread though, op. *raises eyebrow*