Thanks for posting on HCM,
I suggest you give it a few more days; up to 7 will idle. Early pregnancy
test will often come negative especially if it is urine pregnancy test. It is most likely that you are pregnant and have developed an implantation
bleed (given the fact that you have bleeding prior to period).
It will be important that you book an appointment with a gynobs who can examine you properly and rule out other possible causes of your bleeding such as pelvic infection
, pregnancy complication, PCOS
etc. From your description, i suspect you might be pregnancy and that will just require that you give it some few days to redo the test or you visit a gynobs who can do a pelvic scan and request for a serum beta HCG
Hope this helps