Hi, I am currently 5 weeks pregnant. About a week ago, i started having brown spotting. a few days later it got to the point where i was bleeding like i was on my period. I ve had two ultrasounds and blood tests. my hcg doubled, and the ultrasounds revealed it wasn t ectopic. However, nothing else has come to light and I have been having the brown spotting for a week now. what could this mean?