What is going on with my body ??

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So on the 16th I woke up to a spot of blood, figured I was starting AF a little early only by a few days.

Usually I get the cramps, sometimes gassy and I'll have that weird brown stuff for 1-3 days before I start.

Well this time I haven't gotten anything other than the brown stuff but have had all the normal AF symptoms. Cramping, not hungry, headache, nauseousness, moody. That's all typical.

So why am I getting all this but no AF? I find it very odd and this has never happened before.

I took a test yesterday and it was negative. I almost feel like the symptoms have been worse though. I have been off BC since April and have had normal AF since