Hi @joe6767, I can see you are very scared and want to be sure you are getting the right treatment. It sounds like you might be getting advice from people who are not medical professionals.

The lobectomy surgery did not cause the cancer to spread. Small cell lung cancer is often discovered when it has already started to spread. This may be limited spread or extensive spread. Surgery followed by chemotherapy is commonly used for patients with limited spread.

You should tell your cancer team about your worry and the pain you are experiencing in your belly. Stress can cause pain. Your cancer team can check to see what it causing the pain in your belly and even help you with managing stress.

You may wish to do this online course from Mayo Clinic. It is free and you can do it on your own time:
– Stress Management for Cancer https://connect.mayoclinic.org/blog/cancer-education-center/tab/stress-management/