Cramping with light pinkish after period

Leydi
My period just ended saturday,and since yesterday i been having cramps and was moody. Monday i saw light pinkish blood when i wiped but very little i ignored it. I have  also had light cramping and still now early tuesday i have light pinkish blood on my panties. This has never happened to me although i am ttc, havent had sex for a week and a half.
Can anyone help me understand what is going on? Please 

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