Implantation bleeding

Any of you ladies experience implantation bleeding before? What did it look like, how long after implantation can you expect to see spotting. How long did it last and how close to AF did it happen? On 13dpo had brown spotting mixed with creamy cm(sorry for tmi) and cramping and today nothing. Usually day of AF I will start to spot but will reach full flow later the same day. This is new to me. Not sure what to think. Would appreciate your experiences