Chelsea get off of your high horse. the op was using contraception, this is an unexpected pregnancy. As someone who has been through an unexpected pregnancy, the range of emotions you go through is terrifying! The sudden knowledge that your life is going to change completely is incredibly hard to process. You don't get to project your shit on the op, it's not fair and is dismissive of what she is going through. Kindly take it elsewhere if you can't bring yourself to offer actual support.
Op, when I fell pregnant with dd (contraceptive failure) I was beyond anxious, terrified, really distressed. I felt trapped and struggled to deal with the way I was feeling. The biggest thing I can say is if you want to continue with the pregnancy, just give yourself some time. I put so much pressure on myself to process it all immediately that I pushed myself to a near mental break down. There is a long time until the baby is born. I swear we take this long to create our babies to give us time to get our head around it! Just let it happen gradually, take the pressure off right now. Distract yourself with other things, you are still you, your life is still your life, just slow it all down.
I probably had a more extreme reaction than you for various reasons, but I still got there in the end. My dd was born and I sobbed with happiness, and wondered why the hell I had been worried at all. Of course it was the right thing to happen, it was her!
You can do this if you want to. If you don't want to there are options. you are not trapped, your future is in your hands and you are in control.
Good luck op. It will all be ok, I promise.