Got told Im not able to get a medcal certificate to take this week off of uni because I havent been sick long enough... WHAT

WHAT THE HELL IS THIS. Yeah I only have been sick for like a week now, but I honestly feel like complete shit. I dont have a voice and I feel like im swallowing razor blades every time I swallow. Its horrible.
Now I have to drag myself out of bed tomorrow and travel 1 hour to the other doctor and pharmacy just to see what they say. and hopefully get the damn certificate so I can take days off of Uni without it affecting my grades.
THIS IS SO ANNOYING. My sister got a medical certificate a few months back when she wasn't even sick. MEH. I'm so annoyed.