Good for you for getting a mammogram! I believe they recommend getting your first one at least by age 50. You can rest assured they try to keep the procedure as stress-less as possible. The whole process usually takes 10 minutes or so. Of course at some point, the machine they use does need to compress your breast a bit so that it will show a good "reading", but the little discomfort does not last long. Afterward, you will feel good knowing you did the right thing. You'll be fine! Let us know how it goes