I am on my 12th day with Nexplanon and I just noticed I am having veryy light pink blood coming, but only when I use the restroom I will see it on the paper when I wipe (not enough to wear a pad) and on day 9 and 10 of being on Nexplanon I had unprotected sex and on day 9 my partner came in me. Is it supposed to be working for sure after the 7 days have passed or could I still get pregnant? I'm really worried and hope this is normal. I don't have any other symptoms other than spotting.