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The altered and prolonged bleeding/periods could suggest other underlying problems like hormonal imbalances, thyroid abnormality, endometritis, endometrial hyperplasia, ovarian problems etc. Passing occasional clots and endometrial tissues in menstrual bleeding is normal. The exact cause can only be made out after careful evaluation. Consider visiting your doctor/gynecologist at the earliest for thorough examination and further evaluation to look for the underlying cause for the abnormal bleeding that you describe. Treatment as needed (based on examination findings and investigations results) would be started to help you control the bleeding and regulate your periods. Consider being 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.