I have had period like cramps for about 5 days. i thought it was pd pains but am now 3 days late for pd. have also felt nausea for the past week. I am concerned about these cramps, all info says implantation cramps last about a day or so. I have had mine constantly all day for about 5-6 days if not longer. I was hoping it was a good sign on being pg but now I have doubts. Anyone experience cramps for so long so early on and turned out pg ?