My Breast Cancer wasn't a lump. It was a thickening, an increase in size that I put off to weight gain. It was the most common kind "Ductal Carcinoma in Situ" Because it was caught early and was still in the original type of tissue that it started in, I would end up having surgical removal and only Tamoxifen, a pill for 5 years. I didn't have to have radiation or chemo.
Getting a mammiogram is well worth it. Even though it is stressful. Not knowing is even more stressful.