Ok so my last period was 18th July 2015 I was due a period on the 20th of August 2015 which is now 6 days late. I have sore boobs and backache plus sickness and heartburn. I have taken 3 pregnancy test which has come back negative.I had a bit of dark brown blood on the 23rd of august which stopped after 2 hours was very light since then i have been having really bad pains as if my period is going to come then nothing,I was just wondering if it is to early to tell if i am pregnant yet or weather it is just a very late period