No rude answers please and thank you :) pregnancy :D?

Just wondering but I started the pill May 24th and only took one because i then decide to wait until my period to start to take it. So ive only had on pill which was monday keep in mind. wednesday the 26th around 10 in the morning i noticed some pinkish discharge. it was barley there and thats all ive had. i have had unprotected twice this month so what do you think it was? breakthrough bleeding from taking only on pill or implantation? THANK YOU SO MUCH :D