Implantation?

Mia

Have everyone that gotten pregnant before, have everyone experienced some type of spotting in order for you to know that you were pregnant?

I only have sore nipples, and my period is 3days away, well that's what glow say I started my period on the 17th of August so I may have 6days till my period. But what I'm asking is do you have to spot to know that you're pregnant???