so ive been on the patch for almost 4 years now and ive been using it perfectly and I've had normal to light period every time it's due, I've also never experienced trouble or pain what so ever with the patch. This week (started on tuesday) is supposed to be my break week i usually get my period on wednesday but now its friday and theres no sign of my period, not even spotting, is this normal? My boyfriend and I last had sex the Sunday before I changed my patch. This has never happened before is there a chance of pregnancy? Thank you.