Miscarriage @5week

Patient: HiI was 5 week pregnant on 24th Jan 2014.But i have started bleeding on 24thJan 2014. It was a Miscarriage.I had Red blood bleeding for 3 days but after that I am having on and off brown colored discharge with mild stomach pain and small pieces of brown tissue. It is almost 14 days.Is this some problem? When it will stop?