Hi,
Welcome to ehealthforum,
The symptoms of pink discharge and pelvic discomfort that you describe could suggest chances of ovulation, breakthrough bleeding, pregnancy etc. The exact cause can only be made out after careful evaluation. Consider visiting your doctor/gynecologist for thorough examination and further evaluation to look for the underlying cause for the symptoms that you describe. Treatment as needed (based on examination findings and investigations results) would be started to help you to control the symptoms. If you suspect chances of pregnancy, you should consider visiting your doctor/gynecologist for thorough examination (to confirm pregnancy related changes/signs in body) and blood/serum HCG level test (to confirm/rule out pregnancy accurately). Consider being in regular monitoring and follow-up with your treating doctor/gynecologist and report any new/abnormal symptoms immediately. Drink plenty of water. Take adequate rest.
Take care.