Are the yellow discharges that do not appear on the pubic area or underwear, but rather appear when a cotton swab is inserted at the vaginal opening while standing, considered to be from the inner or outer part of the vagina, and do they invalidate ablution?

What comes out from the secretions to the outer part of the vulva, which is what appears when relieving oneself or sitting, or what must be washed during ghusl and istinja' (ablution for defecation/urination), is considered to nullify wudu'. What does not reach this outer part does not have an effect. When a tissue is placed on the outer part of the vulva and a trace of the secretions appears, that is considered an discharge that nullifies wudu'. It is also advised to be extremely wary of obsessive whispers (waswasah) and to turn away from them.