Could this be a sign of implantation or is this regular ol pms cramps just starting early? Hello ladies so today I am either 10 or 11 dpo. My period either on Sunday or Monday. Starting yesterday I started cramping like pms cramps half way thru the day. Today I am having the same cramps. I honestly only get cramps 1 or 2 days before my period. My back was extremely killing me. Now today, my back is only hurting hurting just a little bit. Last 3 days my bbt has been at 98.0 My CM is still watery/creamy and I'm going to the bathroom even tho I don't have a whole lot coming out.