Could I be pregnant?

Okay so I had my period last week. I am on ortho evra Birth control. Well I was, until this week. I stopped this week because I had no way to go get my patches. So now my cycle is messed up. I'm sexually active about 5 times a week and I never use condoms. I'm wanting to prevent pregnancy and usually I don't worry about using condoms because I have ortho evra. But this week I didn't take it and had unprotected sex 5 times. We used pull out method but I know that doesn't always work because I have one child already who was a result of pullout method. :) my question here is, what's the chance of me getting pregnant? Very high or very little or..? I'm Rey nervous. Please help.