melissteach8,
Most likely pregnancy did not occur, as you would not have spotting for this many days straight. Typically 10 or more days straight of spotting or bleeding warrants a visit to see a doctor. Period abnormalities can be due to many things including stress, weight gain/loss, thyroid, hormonal imbalance, infection, illness, medications, polyp, cyst, amongst other reasons. The only way to know for sure exactly what is going on is to see your doctor for an exam and testing. If your doctor suspects a hormonal imbalance, a simple blood test will show this.
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