Light spotting?

Raynie • Mommy of one 7month old angel.
Hi, there. I'm Raynie. I started very light bleeding today. No cramps. Hella light. Pinkish, barely enough to affect a panty liner. I've been having unprotected sex for the last month because we've been TTC. I'm not supposed to start until the 20th. Could this be implantation bleeding?