Unprotected sex around and after ovulation time with pink bloody discharge 9 days past ovulation is mostly suggestive of early implantation
Here, you should undergo one home pregnancy
test with urine initially after your missed period to check pregnancy status. One blood test
for beta HCG
& TVS scan (around 4-5 weeks) is required to confirm product of conception.
After that, you can consult with gynecologist for next line of management for this condition.
For direct consultation with me, you may visit my profile on http://www.healthcaremagic.com/doctors/dr-soumen-patra/63326. Here, you can upload image for more suggestion.