Possible implantation?

Sooo I am 9 DPO today, AF was supposed to be here yesterday but it was a no show. A couple hours ago when I went to the restroom and wiped, there was very light pink on the toilet paper. Since then, not a drop and no cramping, which is unusual when AF makes her grand entrance. Thoughts? If it is implantation, when would it be best for me to take a test? I'm assuming 2-3 days from now?