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Regular and normal periods could suggest return of your normal fertility/ovulation. If you have been sexually active without protection, chances of pregnancy are possible. The current symptoms of repeated heavy bleeding, passing of clots, moderate to severe abdominal pain/cramps, could be indicative of ongoing miscarriage. Do not ignore your symptoms. Visit your doctor/gynecologist at the earliest for thorough evaluation to look for the underlying cause. Ultrasound scan done will help to see if uterine cavity is empty or with products of conception. Treatment as appropriate (based on examination findings and investigations results) would be started to help you control the symptoms and regulate periods. Be in regular monitoring and follow-up with your treating doctor/gynecologist and report any new/abnormal symptoms immediately. Drink plenty of water. Take adequate rest. Maintain healthy diet and lifestyle.
Take care.