I have been spotting all week some brown some pinkish. period due yesterday and i started kind of bleeding bright red but on and off. i had a negative pregnancy test yesterday. is this more likely implantation bleeding or a period?

Can retest in 1 week: Wait. A positive pregnancy test can tell a woman that PRIOR spotting was actually implantation spotting. It can be hard to tell if a woman is pregnant because some of the symptoms seen in early pregnancy can also happen in non-pregnant women. A urine pregnancy test gives a reliable result about 3 weeks after sex (3 weeks after when conception might have occurred), or 1 week after missing a period.