My experience was almost identical to yours . I started IMRT in June of this year and finished 7/25. The side effects were minimal and subsided over the following 2 months. During the 6 weeks of treatment, my urgency to pee increased as well as having soft bowel movements. Also had some minimal pain in the groin/ scrotum. Linear Accelerator was an Elekta Infinity . The RO said my 61 year old body handled the radiation treatment VERY well.