Can Taking Postinor-2 Cause Delayed Skin Reactions And Unusually Heavy Periods A Month Later?

Hello...I had sex 3days after my period and I used postinor2 the next day of having sex...I had skin reaction after 3days of taking the drug...so after a month I saw a little blood....then a month later my period came and is super heavy have used like 2pad this morning....am so worried