Implantation cramps or period cramps

RJ

Hi ladies. Am on 8dpo today. Since yestrrday i have sharp, dull mild cramps on and off and also mild back and leg ache. My period is on march 4th. So am wondering whether is it implantation cramps or period cramps. Does anyone has this cramp 1 week before period and got BFP. Pls suggest me.