First, I'm sorry for your news. Now, take a deep breath and move forward. You have a lot of information to gather before you panic. Have you had a biopsy yet? If not, wait until you get there results of that. Many lumps are nothing at all. If you've had a biopsy, what were the results? Don't be afraid to ask questions. Find out what all your options are. Don't be afraid to get a second opinion. You can get through this.
Best of luck to you,
diagnosed 2 years ago and doing great!