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Aya

Here is my glow calendar and my cycles have always been 25-26 days apart. I thought my period was coming Monday like I had a pad on and everything but it was just clear discharge a decent little amount. I’m having cramping like Af is going to start but I am not sure why Af is holding back. I took a hpt this morning it was negative so I don’t think I am pregnant. Anyone know what it could be?