My boss got mad at me for calling in yesterday

She was like you keep calling in on sundays. You shouldn't do that Sundays are so busy etc. I'm just like I wasn't feeling good enough to come to work and wouldn't have been able to do my job very well and I hardly ever call in unless I have to. I haven't called in in months. Managers should be more understanding about people calling in. They care more about people being at work than their health.