Feeling Guilty

I am 29 years old. At the age of 25 I was diagnosed with endometriosis. I had the surgery and did some rounds of Lupron. After my surgery my doctor explained that I would still have a 50 percent chance of having fertility problems. He tried to force to me stay on birth control and said this would keep the Endo and my cysts away. I refused to stay on birth control and switched to another doctor. Sure enough my cysts came back, I now have 6. I had unprotected sex for 5 minutes one single time and got pregnant. I feel guilty because I wasn't even sure I wanted kids! I'm confused about my feelings and I don't feel that excitement everyone here feels. I am also dreading the pregnancy process. Am I the only one who isn't over the moon about being pregnant?