My last period was February 23 and ended February 27. I had sex on the 26th and multiple times March 1st. All my <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">period apps</a> say my fertile window was February 28th - March 3. And now today I’m around 6 - 7 dpo and I wiped and see a light bleeding. My period isn’t due until 5-7 days from now. Could it be implantation bleeding???