Can you have slight cramping with implantation bleeding and can it go from brown to a red mucus closer to when my period is supposed to start?

Hard to guess: Only 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 a "weird" period.