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The symptoms could be attributed to the hormonal content of the hormonal birth control pill (and prolonged use). If the symptoms have been persistent, you should consider visiting your gynecologist for thorough evaluation. See if changing to alternate low dose pills or alternate method of birth control can be of help in controlling the symptoms. Be in regular follow-up and monitoring of your treating gynecologist/obstetrician and report any unusual/abnormal/new symptoms immediately.
Take care.