Thanks for writing to us with your health concern.
IT could have been an old underwear.
ALso, as long as the discharge is not foul smelling, there is no major cause of worry.
Do you have itching, redness
, pain, difficulty during urination or intercourse ?
If yes, it is indicative of infection.
IF any of these symptoms develop , please go for a vaginal swab and culture to confirm the source of infection.
All the best
Please feel free to discuss further.