Worried About Stomach

[Annie8515]

Worried I might have a tumor in my stomach abdomen area. I've seen three separate doctors and they have all given me exams and have said they felt nothing and are not worried about anything. Also had complete blood panel done. So worried. I am constantly pushing on my stomach. Poking. Prodding it. I can feel this sausage like thing in the middle between my sternum and my belly button. I can also feel some other weird lumps and bumps. My fiancé says since I'm so small I can just feel my insides and that nothing is wrong. I think it's starting to get sore but I'm scared and can't stop. I've been living with this anxiety for months and feel like I won't be able to drop it unless I get some kind of scan or something. Wtf do I do :(