Change in diet and "Aunt Flo"

I have been dieting and exercising for about a month now (exercise started about 5 weeks ago, diet 3 weeks ago). When I started the diet portion I was on my period. Now, three weeks later, I am getting my period 5 days early.
The thing is I am on BC and my cycle has always been regular with this brand. I did take my pill 5 hours late yesterday, but at the regular time today. I have done that before and it never caused me to start.
Also, I am not around any other women enough for my body to be trying to "synch".
The only thing I can think of is my hormones are changing due to improved diet/exercise and possibly overpowering my pill. Has anyone else had any issues like this?

Fri. Jan 25, 1:57pm

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