My mom and I got mad at me over something pointless. What should I do now (Read desc.)?

Does your mother know your situation? Did she know you threw up? Did she know you were ill to begin with? If not, I think it is very important for you to discuss this with her and I am sure she will react differently than she did. If she did know... well, this is a quirk that you have to know about your mother. I don't your relationship between you and your mother, but don't let this incident tear you from her. I'm sure she's given care to you, much more than she's annoyed you. These annoyances happen in families. But so do many more things—good things.