Cramping 8 days before period

I’m currently 6dpo according to Glow and I’ve been cramping everyday since my ovulation day (9/26). My love and I baby danced on ovulation day, two days prior and a day after ovulation. I also have lower back pain and I throw up a little when I burp but that could be acid reflux. Light headaches here and there. Could this be implantation and i could possibly be pregnant?