Anyone had implantation bleeding??

India
Please help me! I never had this with my first and I'm scared it's AF coming. It was only a pinkish tinge to my cm while checking my cervix. This has happened before and it was AF  but it was the day AF was due and showed up. This would be 3 days before AF is due and I'm NEVER early. Also when that has happened before my cervix was and had been verrryy low firm and open. Today my cervix was so high I could barely reach it and it was soft and closed.
Ladies if any of you have experienced implantation bleeding pls tell me about it!! I'm stressing over here!!!!!!!