I switched from Ortho Tri-cyclen, the pill, to Ortho Evra, the patch, this past month. I've been on the pill for almost three months, and I LOVED starting the patch this month-- switch it once a week, no hassles. However, today I started my first period since the patch and it has been HELL. My periods since being on the pill have been pretty easy to deal with: no cramps, some back pain, and my IBS acts up. It's moderate for maybe a day, and after that not at all. And it's usually gone by the fourth day. But today...I started this morning and I have had unbelievable cramps, awful IBS pain, a headache, and I've been bleeding very, very heavily. I'm going to call my doctor in the morning about going back on the pill-- after one day of this, I'd rather take the pill every day. Just to warn you if you're thinking about changing from pill to patch...there could be repercussions come period time.