The substance will be clear at first and get more white and stringy, looks and feels kinda like white snot stretches between ur fingers.
Implantation bleeding would be light not heavy it's it's heavy like a period it's a period but in 2 weeks from the first day of ur period u will start to ovulate u have that week ur biggest chance to get preg. If u start to have a thick sticky substance from the vag that's when u are most able to get preg. It's easier for sperms to move through that to get to the egg.