Can a change in the abundance of menstrual bleeding be the result of taking a tablet after ellaOne?

Hi, from 5 days I have menstruation, compared to all my menstruation is quite scant (normally I have very heavy bleeding for the first 4/5 days and menstruation lasts an average of 10 days, I have so for several years so it seems to me normal-such my charm). Today, that is, the 5th day of menstruation is a very small amount of blood. I want to point out that on May 16 I took ellaone tablet, 36h after intercourse (I take Vines tablets but on the day of intercourse I had diarrhea flocks my decision to tablet the day "after"). My question is - Can less profuse bleeding be caused by taking a tablet? I do not have any other ailments, I have never had painful months, my head hurts quite often for a week but since the beginning of puberty I suffer from light migraines several times a month. Today I did a pregnancy test negative result, before bleeding I also did 3 tests and also negative.