Had pinkish discharge the day of my period with BAD CRAMPS next was normal as it filled a tampon but then 3 days were brownish is implantation bleeding?

It's possible that the pinkish discharge you experienced on the day of your period, accompanied by bad cramps, could be related to implantation bleeding. Implantation bleeding occurs when the fertilized egg attaches to the lining of the uterus, which can cause some light spotting or bleeding. This usually happens around 10-14 days after ovulation, but it can vary from person to person.

The brown discharge you experienced for the next three days could also be related to implantation bleeding. As the implantation process continues, the blood can become oxidized, leading to a brownish color. It's important to note that implantation bleeding is not always a sign of pregnancy, and it can also be caused by other factors such as hormonal imbalances or uterine abnormalities.

If you're experiencing unusual or concerning symptoms, it's always a good idea to consult with a healthcare professional for evaluation and guidance. They can perform tests, such as a pregnancy test or ultrasound, to determine the cause of the bleeding and provide appropriate medical advice.