<human>: I've been working at a local Pizza Hut restaurant as a cook. I decided to call in sick yesterday due to the fact that when I swallowed, I felt like I was swallowing razor blades. Along with my soar throat problems I have been coughing and sneezing, I've missed work only once before. (I was hired Sept 12 this year) for the same reasons. I had a doctors note when I returned to work to confirm my illness. 

This morning I wake up to a call from my manager accusing me of missing work 3 days, and being unreliable when the last two days I did work I was asked to stay an extra hour later (one of those nights I didn't leave until after midnight) and I agreed to stay later and help out as much as I could. 

I've tried to call a Pizza Hut corporate number to speak with someone, anyone about the situation but they just have an automated voice playing, giving you some song and dance bullshit. I feel like my manager is in the wrong here reddit and I was treated unfairly, so I ask you, reddit, what should I do?

Can you summarize the given text in a few sentences?
<bot>: Was 'let go' by my manager for calling in sick twice in under a month, have doctors notes to prove my illness, feel like I was treated unfairly.