Bleeding while on yaz?

I started taking yaz on may 6th (Sunday of my period) and I’ve been bleeding like crazy since the 24th of may. It’s comparable to a light period and I’m cramping at times too. The cramping began after sex on the 25th. Has this happened to anyone else? I can’t get an appointment till mid June, so I was wondering if any one has any tips or can tell me what is going on. Thank you!