What to do?

I’m in the first trimester and last night I was very nauseous and got sick a few times. Then a headache came on so I took medicine and went to bed. My 18 month old always sleeps through the night but oddly woke up 2 times. This morning now my body is so achey and tired. My head is also pounding. I have to work today but honestly I feel just horrible. Has anyone ever called out from something like this? I don’t want my boss to be frustrated but I do not feel great