I have made an orbit but I was trying to get back to the surface during the larger part of my orbit. My vertical velocity was in the negatives for a while so I knew I was going down, but suddenly it went back up to 0 and slowly increased. I then realized that I had sling-shotted around the planet and am currently leaving the atmosphere at a rate of about 2000m/s. I have been running it for about half an hour and it has just gotten to the 900km mark.