Cramping

Ok so I've been having cramps and a hard type feeling in my pelvic area. I'm 7dpo and the cramps comes and go but they stay for a little while. They are stabbing like but don't hurt to bad I shift the way I sit and it feels a little better. Sometimes it feels like AF cramping or constipation but I'm relieving myself normally ?AF is not until the 28th. Does this sound like implantation?