Does Plan B change my entire cycle?

Mika • I'm just a girl 🥀

Back in June 24, I had unprotected sex and took Plan B afterwards. My period was due on July 5th but it arrived on July 3rd, then a week 4 days, I had breakthrough bleeding (assuming that it was a side effect from taking the Plan B).

I was wondering when I'm supposed to have my period for the month of August. Does taking Plan B last June change up my whole cycle? It's been more than a month since I took up Plan B.