Tilt your head and swap sides
I use otrivin when that happens. It's nasal mist decongestant, it also works if the sinuses are swollen or blocked. Only use it for 2 or 3 days though, you can get addicted if you use it too much.
sinus infection one the side , for the moment ... wait till later maybe your sinus will share with the other side .... maybe not
Mine too :(
Were you lying on your side?