Hello dear, I understand your concern. In my opinion the pain abdomen with pink discharge needs to be evaluated. The physical examination needs to be done to check for any cervical changes and any threatened miscarriage need to be ruled out. The causes for this like any thyroid abnormalities,progesterone insufficiency, any short cervix should be found. Don t worry once the cause is treated it will subside. Avoid stress,physical strain and intercourse. Take adequate fluids upto 3 litres per day as dehydration also might irritate the uterus. My aim is not to make you tense but just giving you the probable suggestion. Ultrasound helps in knowing the status of pregnancy. So I suggest you to consult doctor for further work up. Hope this helps. Best regards...Dr.Srilatha