Can birth control cause irregular periods?

Update: Previous to being on the pill my period was very regular, lasted for five days start to finish and my hair didn't shed very much. Then I got married and was on the pill for three years and my hair started shedding heavily. I stopped the pill cold turkey as we were about to start trying for a baby at the end of... show more Previous to being on the pill my period was very regular, lasted for five days start to finish and my hair didn't shed very much. Then I got married and was on the pill for three years and my hair started shedding heavily. I stopped the pill cold turkey as we were about to start trying for a baby at the end of September. October through to now my periods have been starting earlier and have been getting shorter in length. Could the pill have caused some sort of reproductive issue?
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