Hi I've need to know if bleeding for a month is a seriouse problem 7 days of it was my period

Bleeding. Bleeding for a month is something that needs to be investigated. You could be dealing with uterine fibroids (benign tumors of the uterus), cervical dysplasia (precancerous cells in the cervix) birth control side effect, pregnancy/threatened miscarriage. Also you may be anemic from all the bleeding (low blood count) which also needs to be addressed. Please see your doctor as soon as possible.