2 tumors

Well I haven't had my first surgery yet and now they found another tumor. They said it hadn't spread but now they are saying I have one, which is the one I started out with, on my lower right lobe and my surgeon did another CT scan before scheduling surgery and now there is one on the upper right lobe. This all happened in a month's time. Has this happened to anyone else? I see the surgeon tomorrow and don't know what to expect.