Sinus infection advice

Hello guys, I have a sinus infection and being a full time student with a job (who is also going on a plane this weekend to see my long distance boyfriend before we move in), I’m kinda pissed. I’ve been sick constantly these past several months especially from the stress. It’s my last quarter before I graduate and I really need some advice for how to get rid of this infection as soon as possible.

Thanks 😔

EDIT: my doctor just brushed it off and says “I’m not that sick”