I had been using the birth control patch Ortho Evra since I was 16 I'm now 20 and I've been off the patch for about 4 months. Ive been under stress lately and I have depression. I've dropped from 115lbs to 100 in the last 1-2 months. I have had unprotected sex in the last month he pulled out and didn't even go in all the way. I'm now 10 days late for my period, I thought last week I felt it coming on but it never did, help?