I am usually very consistent with my pills and I had pretty decent breakthrough bleeding. My period stopped and then 3-4 days later decided to come back and is a brown discharge. Keep in mind I was a few hours late taking my pill on Wednesday. I was fingered by my husband and he possibly could have had some semen on his hands, not sure because he washed his hands. Could this be implantation bleeding? Am I pregnant? I take Lo Loestrin Fe 10mg.