I had prolonged periods last month that went on for 3-4 weeks. It was very light like spotting. The first week I had black clots and brown discharge as well then, fresh red blood spotting for 3-4 weeks straight. The spotting stopped for 5 days and now I have my periods again for this month. I always had a normal cycle so I am a bit concerned this time. I sometimes have a light discomfort as well on the left lower abdomen. I also want to point out that I had alot more than normal cystic acne on my cheeks and chin during the 1 month of spotting as well. Other than that no other noticeable symptoms. Please let me know what could be the possible cause. Thanks.