I'm a 28 yr old female. sexually active. always use protection. my ? is; i have been on my period for over week. is that normal?

No: Some women have regular prolonged periods. However it appears this is not the case for you. If bleeding continues then see your doctor for evaluation.

Family practice : It may be normal. But any changes of your menstral cycle are a reason to find a cause. Let your dr know.

Yes: Irregular menses is very common in young women who are not taking hormonal contraceptives. Periods can vary quite a bit by duration & frequency. The important thing is to use protection (condoms) when engaging in sex to minimize risk for both sexually transmitted diseases & for pregnancy. Ideally, if hormonal birth control is tolerable, pills/patches/shots could serve as 2nd line against pregnancy.