Should I choose 1 week or 3 week radiation for breast cancer?

1 week vs 3 weeks of radiation??? Hi! I have stage 1 A left sided invasive ductal carcinoma HR/PR +, Her2- with no lymph node involvement. One month ago I had a lumpectomy with bilateral breast reduction. Oncotype score low, genetic testing was negative so no chemo needed. I recently met with the radiation oncologist and was given the option of 1 week (5fractions) vs 3 weeks (16 fractions). It would be the same dosage of radiation for both treatments. I was told efficacy and side effects are the same for both treatments. I don’t know which route to go. I am leaning toward one week (just get it over with), but have sensitive skin and not sure if all that radiation in one week will have a worse outcome for me rather than spreading over three weeks. Also concerned about my heart and fatigue. Has anyone had experience with 1 week radiation treatment? Do you recommend rather than 3 weeks? I know everyone is different, but just looking for people’s experiences/thoughts. Thanks!!!