It's nobody's fault, but...

So, about 4 months ago, I made plans with a friend to go out for some game meat dishes. As the date got closer, my friend ended up pulling a muscle and we had to postpone. Then, when the rescheduled date was near, we had the restaurant booked and were all set to go, but they contacted me saying they were dizzy and couldn't move. So, we decided to postpone again. And now, we were scheduled to go this Saturday, but yesterday, my friend contacted me again saying their irritable bowel syndrome had flared up... Am I being petty for getting upset about this...? I know it's a physical condition and they can't help it, but being treated so dismissively like this is frustrating. For reference, right after their dizziness got better, they went out with someone else under the guise of 'rehab'. ...Is this a situation where I'm allowed to be pissed off? 🤔