Hi, and I had a similar experience, so I understand completely about the shock. I had a routine mammogram on July 23rd and on September 25th I had surgery, followed by radiotherapy, so it was dealt with very quickly.My experience was a good one. Everything was explained to me and my family was able to attend the consultations and ask questions too. I was given a lot of leaflets and the information in them was very well set out and answered most of my questions. My surgeon decided on a lumpectomy, removing the lump and not the entire breast, and gave clear reasons for their decision. It was sore afterwards, but I think that was more due to the drain that had to be left in for about two weeks. The operation was done during day surgery. During the time I had the drain, a district nurse would call to check it was ok.  
The radiotherapy took place just before Christmas and the staff at the hospital were wonderful. I would say it was a little uncomfortable and my skin felt hot afterwards, but they advised me to moisturise a lot, and that really helped. 
If there's anything else you'd like to ask, please feel free. I know it's a worry, but the main thing is that they've found it and can advise on treatment. Take care of yourself and try to distract yourself from this as much as possible. I see you have grandchildren and you work, so it sounds as if you have a good and busy life. Gill xx