I am 30 years old for the past 2 months my menstrual cycle has changed. It is brown spotting for 5 days followed by light red for 2 days then brown for 3 more days. I have always been really regular and so bleeding for 10 days alarmed me. I went to the dr and they ran a blood test and all my levels were normal, no anemia either. Then we did a vaginal ultrasound and that came back saying my uterine lining was too thick. I then went to the obgyn and he said he was not concerned about the thickness because of my age and that i should be starting my period soon. Well that was May 30. I started spotting brown on June 6th and has continued. This is completely unusual for me and I dont know what to think. Everything i read says 10 days of a period is a sign something is wrong. Should I get a second opinion or ask fo another ultrasound after this period to check the uterine lining?