I don't know what to do.

I just took a pregnancy test today and it came back positive. My period was late so I thought to take it. The fact that I'm pregnant now I'm guessing I'm about 4 weeks. I'm on the pill but I can admit that I haven't been 100% consistent with taking it. I'm not sure if it's practical to be pregnant at this point in my life. I have so much planned and I am growing a business. I already have 2 children ages 6 and 5 ( whom I'm sure would be thrilled to know they would have a sibling on the way ) I just don't feel this is the right time for a baby. Not only that but it will put my business on the back burner when I'm in such a critical point. I'm about to get a commercial building and I know that it will be extremely difficult getting things together with a new born baby. I'm afraid to (sorry to say this) abort it, but I'm also afraid of having it. Could you guys share some of your experiences with me if you have ever had to make this difficult choice. Thank you.