My ortho evra patch change day is Monday and this is my patch free week. I was wondering when will my period come because it's Wednesday and it hasn't came yet. I've had sex in these past 3 weeks with and without a condom and I took antibiotics over a month ago. Is this going to affect me in any way. I've also already had a period since I've stopped my antibiotics (the period was 3 going on 4 weeks ago)