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Period lasting for 11 weeks and more is concerning.
At this point, it is important to see your gynecologist. A detailed clinical examination, colposcopy
abdomen is warranted to rule out local pathologies. If all these tests are done and are normal, dysfunctional uterine bleeding
needs to be considered.
As far as treating it is concerned, your gynecologist might start you on norethisterone
/ combined oral contraceptive pill
for a month or two. The chances that this will stop the bleeding is more likely as you mentioned the bleed did stop while on it. Discuss with your gynecologist.
If oral contraceptive pill do not help, then therapeutic dilatation and curettage is entailed.
Hope this helps.