Brief Answer:
Can be due to many causes
Detailed Answer:
Hello,
The mild pinkish spotting that you had can be related to a uterine or cervical cause like uterine polyp, cervical dysplasia, chronic cervicitis, cervical polyp, vaginal bacterial infection, dysfunctional uterine bleeding. etc.
To find out the cause, you need to consult your gynecologist for a PAP smear and a lower abdomen ultrasound scan.
I hope this answers your query. In case you have additional questions or doubts, you can forward them to me, and I shall be glad to help you out. Wishing you good health.
Regards,
Dr. Rakhi Tayal