Implantation? HELP!

Just used the bathroom at work and wiped to find this. My fertile window ended 2 days ago, also have had unprotected sex (using pullout method. But while my SO and I were changing positions I happened to notice a lot of white "substance" in his pelvic region but he said he didn't get off.(?)
Can someone please give me a bit of insight, I am absolutely terrified to become pregnant, especially when I'm supposed to be moving for school next July for a year.
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