Hello and welcome to HCM.
Thank you for your query.
I have gone through your query, and would first like to comment on the appearance of a pinkish like discharge. This is present in either of the following two scenarios:
1. An approaching period (if this is the reason you should expect it in a day or 2)
2. An infection (infections are one of the most common causes for menstrual irregularities); which is why I would recommend a physical examination by a doctor and analysis of your urine in a laboratory
In all such cases of delayed periods, pregnancy
should be ruled out. Which you have done, but this time, do it using an early morning urine sample. Repeat this with a 2-5 day gap between each test, to be conducted 2-3 times to get a confirmed result.
But you could just visit a doctor at the earliest, who would rule out/diagnose an infection or pregnancy immediately.
In the meantime, please abstain from all forms of sexual contact.
I hope I have succeeded in providing the information you were looking for. Please feel free to write back to me for any further clarifications at: http://doctor.healthcaremagic.com/doctors/dr-shoaib-khan/64581 . I would gladly help you.