If i take a hpt tonight and its positive does mean i'm really pregnant again with new baby or could it be a false reading from m/c going on 5 weeks now?

You need blood work!: A home pregnancy test alone in this case is no enough to confirm pregnancy. Your doctor can do a serum HCG level in the office. This value typically returns to normal within two to four weeks after a completed spontaneous abortion or miscarriage. Follow-up HCG testing is unnecessary if normal menstrual cycles resume. If your cycle did not resume, but you have pos test results, see your doctor.