Well, I can understand how you feel. This past week my mom went into the hospital to have a hysterectomy for uterine cancer. This was her first surgery and she was scared. I spoke with her the night before she had the surgery.
There was multiple complications. She had low B/P, massive blood lose, acute renal failure, a stroke which has so far affected her vision, and now an infection at the incision site which goes from her pubic bone to her breast bone. Tomorrow they will do one more CT to see if this stroke is continuing to damage her brain. She is in restraints, sedated on and on a respirator.
I had a very difficult and stormy relationship with my mom for 40 years. She never forgave me for something that I did when I was 16 years old. I resented and was deeply hurt by not only that but how she treated me.
This past fall she went into the doctor for an infected cyst on her back. When she was finished with the treatment she was a changed woman. She forgave me just about the time I forgave her. We had some really nice loving talks throughout December. A week before Christmas she found out she had two different types of cancer. She is 73 and also diabetic but she manages her diabetes well and she was considered in good health prior to this surgery.
My sister is very angry and upset. It is difficult to talk to her since she is there with Mom and I am here 1000 miles away. I can't take off work because I simply can't afford to but I call multiple times a day to get the latest update. I have peace about my mom and our relationship. If she dies, I will be sad but there is nothing more that I would have or could have said to her. What timing, huh?
I hope that you are able to express your grief and "the could haves" to someone close or even journal. You are right, how many calories are in a cupcake really pale compared to events like this. However, I plan to do my best to stay on my plan because I need to take care of myself now and in future months, years. I hope you will too.

