And the famous line from Kindergarten Cop comes to mind... It's not a tumor!
Love it! I don't have any muscles in particular that have freaked me out. Years ago, I worked out and stuff, but wasn't losing any weight which was part of a wicked cycle I was in. I was pretty shocked when I started losing weight to see the muscle definition start to show, particularly in my arms. It was always there, just hidden by fat. Now I'm seeing new msucles pop up on my hips and chest area from exercise, and I rather like them!
I think you'll become more accustomed to the muscles, so they won't seem so pronounced.