For today I'm going to not show up to work
Work is important. Why are you doing that?
I'm still feeling really sick today, I'm just going to call in sick.
That's awful that you don't feel well still. It makes sense not to work under certain situations like that.
Yeah, I'm going to call in and say I'm not going. My mom will take care of me.
That's so sweet your mom can still come over like that even if you are an adult! I hope you can recover quickly, and enjoy your time off. It was very responsible to not potentially make others sick, and to not make your condition even worse by going.