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It is 6 days after ovulation. My app says I should start my period today. I am experiencing bloating, nausea, and light cramping off and on, and my breasts are a little tender. A couple days before, I was constipated, gassy, a little nauseous and my breasts were a little tender. Am I about to start my period?, or is it implantation? P.S I have creamy cm