Thanks for query,
Due to hormonal
imbalance you gets missed periods but your home pregnancy
kit shows positive result so your doctor had told you that you are pregnant but
You have a false positive urine pregnancy test.This happens some times that kits doesn' having nt show proper results as it will not function properly.
As your Blood Urine & scan is negative it is a confirmatory evidence that you are not pregnant.
You just wait for few days if you will not get your periods you have to take medicines to get withdrawal bleeding.Thanks.