Is this implantation cramping?

So me and my fiance are trying to conceive and a month or so ago i had chemical pregnancy it never implanted. and we started trying again my last period was febuary 1rst and im not due fo about a week.. i never get any cramping or backache dill the day after i start my period, for the past couple of days i have been having this dull ache in my lower abdomin and lower back. never had this happen to me before. could anyone who has ever been pregnant or knows there research tell me if this maybe could be implantation cramps??