Hey guys here's the run down...
I have been using ortho cyclin since last September...
I recently switched to ortho-tri cyclin lo. So I was supposed to take the new dosage on a my regular day which was Thursday... but I didn't. I took it Sunday... I had unprotected sex today (Tuesday). He pulled out.
I'm freaking out because I obviously don't want to be pregnant... should I take plan b? What are my chances of becoming pregnant?

I don't know your chances but there is one. You need to get some condoms. The withdraw method is not a method.

I know, my mistake, I do have condoms, but I didn't use them, I feel like my chances are high since I quit birth control, and started up again with a lower dosage. I don't know... I'm going to still continue my because and hopefully I'm not pregnant.