Pretty damn scared I'll be super sick before or during my trip..

I have a 3 1/2 week vacation in Sweden in late April/early May, with the main reason to attend Eurovision, which is an absolute dream of mine. I've waited years for this opportunity to come and I've spent a loooooooooooooooooooooooooooooooot of money to make it happen. But, I'm absolutely petrified that I will get sick, as I'm prone to painful and debilitating sinus infections. I had one during a cruise a few years ago and it 100 percent ruined the experience. They often come in 2-3 months increments and my last one dissipated three weeks ago, only to reoccur a week later. I'm on the tail end of it now....

I'm super paranoid I'll get a sinus infection before or during the trip, especially right before the flights as I can't really fly with it. Do you have any advice? Thanks.

 

I sound so anxious X)