Plan b no period ? Help I’m so stressed 😬😔!!!

Kayla

Mind you before the plan b 2 weeks ahead I stopped birth control pills .) So I took plan b March 12 and got my period March 27 for about 5/7 days and now it’s been 20 days and I haven’t gotten my second period . I had sex April 15 and uses condoms the whole time and I don’t know where my period is ? Is this normal ???