New to all of this

Hi every one.
I’m 46yrs old and was diagnosed with high grade DCIS 62mm with 4mm micro invasion in Sept. I’ve had lymph nodes removed and then a mastectomy 3wks ago.I opted for reconstruction which was done at the same time as the mastectomy.Have now been told that radiotherapy is needed.I feel like i’m on an emotional roller coaster! Would love to hear from anyone going through similar experience.