So this happened today...

So this is kind of an announcement and asking for advice. While I don't have a test to post a pic of, I just found out I'm pregnant. I wasn't due to start until tomorrow. Long story short, I went to the emergency room today thinking I pulled a muscle in my chest. They did an ekg and blood work to check my heart enzymes just in case. Blood work came back and my heart is fine but I was told I was pregnant! The doctor said maybe a week or so along based on my hcg levels.. She also said a lot of pregnancies don't "come to fruition" so does this mean it could end in a chemical? Or should I just take it easy?