I was not very mindful about taking my pills on time this past month. I missed a couple at a time, several times. My period has always been very regular and moderately heavy. I was supposed to start it this past Sunday through Tuesday, but did not have any symptoms or bleeding until late in the day Tuesday. Even then, I only had spotting. Now, I have been spotting for about three days. Could this be implantation bleeding or just an odd period with very, very light flow? Thanks! If I should take a pregnancy test just to be sure, when should I take it?