I'm really scared. Please help!?

Okay, so I'm on the birth control Ortha Evra, which is the patch. And I think I might be pregnant. I'm always hungry- even after I eat and I get stomach aches and feel kinda sick, but I never vomit. It doesn't make sense that I'd be pregnant though because my boyfriend never finished inside me. He always pulled out or wore a condom and the condom never broke. What do you think?