I was on birth control last month. i am having lighter period flow and brown blood all through my period this month and also been having pinkish tissue with no blood at all. is this normal or a sign of implantation bleeding?

A person can't tell: 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.