I have had lumps checked. Three so far (6 years) - one was while I was still on chemo. It was a schwannoma - had to look it up and I would be really surprised if a nurse could identify that - four doctors couldn't until it was biopsied! One was a neurofibroma (one also got whipped out with my mastectomy!) and one was a skin tag with a wart! I get all the glam bumps. All benign and my surgeon prefers to remove them, he also gets them biopsied just in case. Little cost for peace of mind. Your nurse might worry more if it were her lump and if she had had cancer. Your body, your concern, your right to get it looked at. Best wishes.