I am so sorry you are having to deal with this again. I was 38 at diagnosis. Drank a bit & smoked on occasion, but less than the number of cigarettes they determine for one to be a "smoker". I had precancerous cells & 4 surgeries in the 10 years prior to my cancer diagnosis.
I has surgery in Sept 11 & finished up my radiation by the end of the year. It was difficult- but I have resumed a very normal life with a few "new normals". I am 7+ mos out & feeling great with clean scans & check-ups.
I was also treated in NY by a great team at MSKCC.
I am very suspicious that pregnancy related hormones caused the cancerous change... I'll never know for certain, of course, but it's definitely my feeling.
Good luck to you. This wonderful group of folks can help you & guide you. The support offered on this site is an absolute gift!
Stay strong! You will win this fight!!

Sally