Possibly pregnant?

I was 9 DPO yesterday (late ovulation this cycle) and I started having cramps, slight back pain and diarrhea. Nothing major but I assumed I would get my period at some point in the day because these are usually my symptoms within a few hours of my period starting. However they tapered off but early evening and now are completely gone except bloating. I did take a pregnancy text today (10 DPO) that was negative. Do I still have a chance? Could it have been implantation?