Less heavy flow after emergency pill? (EllaOne)

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Hi everyone, i’m currently on my period and this is my 4th day. Period is light. The first 3 days was heavy, normal bright (and dark) red colour. Usually my flow is kinda heavy also on the 4th day but this time is light. Is it a side effect of the morning after pill? I’ve read it can cause such side effects. I also made sure it was not implantation bleeding: the period came when it was due - only 2 days late. My cycle usually lasts 26 days, according to the app. It came on my 28th day, which is still normal.

I wanna know if somebody had the same experience.