Im get my tubes tied!! Im scared!

So I'm 26 years old, married for 7 years with 2 kids. I just had my 2nd child this past October. My husband and I have talked about all the options before deciding for me to get this surgery. I thought I was okay with it; until my Dr called telling me I'm scheduled for the 21st of Dec. Do you ladies have any words of encouragement to calm my nerves. Thanks in Advance.