Hi,
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Lighter periods, spotting, missed periods and the symptoms that you describe could be suggestive of pregnancy. If pregnancy is suspected, look out for development of any new symptoms. Consider visiting your doctor/gynecologist at the earliest for getting examination (to confirm pregnancy related changes/signs in body) and blood/serum HCG level test (to confirm/rule out pregnancy accurately). Take adequate rest. Maintain healthy diet and lifestyle. Be in regular follow-up and monitoring of your treating doctor/gynecologist and report any unusual/abnormal/new symptoms immediately.
Take care.