Plan B experiences??

Has anyone experienced any weird changes in your period after taking plan b? I took plan B on October 9th and waited for my period to come. While I've been having all the usual period symptoms my period has been nothing but light the past 3 days. I had mostly brown discharge on day 1 along with extremely light red bleeding, bleeding yesterday that was mostly brighter red but again very light, and today the same thing except there were some super small blood clots and I just used the restroom and the blood when I wipe is beginning to be darker red now. It still isn't enough have to wear a tampon or pad though. Can plan b make your period lighter? I also just finished my second month of birth control (I am on the reminder pills right now and I know that can also effect my period but ive been on the pill in the past and never had this light of a period on the pill.