I would also recommend going to the doctor and getting checked out.
i would go get checked out to be safe.. if your doctor is not available, you are far enough along to go to Labor and delivery..
Especially if the blood is bright red.. Some people have unexplained bleeding in pregnancy but its still important to get checked out because you would want to rule out something like placenta abruption , etc..
is it heavy bleeding? are you cramping at all? is the vomiting a new symptom? is your baby moving a lot? have you done anything that may have caused the bleeding?
if you are bleeding a lot, you need to go to the Dr ASAP, if you feel heavy cramping same thing...