Xulane Help!

Sierre

I’ve been using the patch for 4 months now and never had a problem with it until now, my first patch starting the first week I put under my stomach in a spot I used before and it came off as I sat in the shower, so I replaced it with a new one and that I put on my back behind my shoulder, that one came off too but I think it was because of my bra strap or jacket. Now lastly, I replaced it with my last patch which I placed on my arm and it stayed the whole week...when the week was over with I didn’t have anymore patches till the 2nd of July and now I started cramping and bleeding a little bit as if I’m starting my early period, what do I do?? Do I start a new week when I get the new patches?? I’m lost 😩