We need a bit more information. Are you on your period, are you pregnant, have you had an abortion/miscarriage, how old are you, how much blood is too much (are you soaking through a pad every hour or less) have you recently given birth, etc.
i am only 18 but i can relate,i kept on bleeding for months after missing my periods for quite a few months aswel.e doctor said i was ok and put me on birth control pilz that i have to take everyday until i decide to have children.it was due to hormonal embalance in my case so go get blood tests done.it might help you like it helped me.