My period has lasted 2 weeks at first dark brown spotting then 2 weeks of blood is that normal i had a baby 3yrs ago?

Abnormal uterine ..: bleeding. Please keep a very good menstrual record. Many apps. available for this and schedule a consult with a GYN. It could be a transient irregularity or the harbinger of something that requires intervention. More history is needed to be able to elucidate the cause if the irregularity if your vaginal bleeding persists. I will be glad to discuss this further in the chat room. Take care.