On Sunday night I started throwing up and I kept being sick until there was nothing left in my stomach, I felt really nauseous and couldn’t sleep, then yesterday I felt sick and struggled to eat anything and today I have stomach pains whenever I stand up... I have no idea what could be causing this I don’t think it’s food poisoning because me and my boyfriend ate the same thing that night and he felt fine

Sounds like you’re just sick, if you don’t improve within a day or two see a doctor x