See a doctor. It might be nothing or it might be worth a diagnosis. Ob-gyns get lost-tampon calls all the time, so it's not like the doc would be grossed out or anything. Just go.
Anytime you find something abnormal about your vaginal area, you should see your ob/gyn. I suggest you make an appointment today, so you can see her by next week or sooner if she has an opening. Blessings - Blu
Definitely see a doctor. Anytime you find something questionable such as this you should see a doctor. It could be something simple its best to have it checked out. Please keep me posted on the result.