Is it unreasonable to expect someone to not act like a huge butt when they are worried about a cancer diagnosis?

I recently agreed to help a friend out when she was to have a sugery. This person wouldn’t even explain what it entailed till the last moment. Any how, the day before several things where going wrong on my end but I told this person not to worry, because I would be their for them no matter what. I had a little problem with transportation and told him/her I would take a cab if I need too and even what time I would be there. As promised I took a cab. Anyhow the procedure was quick and for the next two days this person never appologized for being a total butt. Now the surgery turned out to be very minor and the doc said it looked good for not being cancer.
I wasn’t expecting a thank you or anything, I feel this is something friends do, but I wasn’t expecting to feel like I was a bother either.
The way this person described me to everyone was, this is my friend who was chosen to watch over me because everyone else I knew had to work and she doesn’t have a job. I mean what she said was true but was it necessary to make it a point with everyone?
I’ve had a possible cancer scare once and I chose to ignore it till the results of test came in. Even when they botched the test several times and I had to go in and retest.
Am I being too harsh? Or did I simply see this person as they really are and move on? I was so discusted with this person that I was in a hurry to leave. They told me thank you before I left but I felt it was too little to late. I don’t need graditude but I appreciate not being put to the screws either.