Can’t breath idk what to do

So I’m pretty sure I have the flu, I’ve been sick now for 4-5 days. It’s not getting better, it’s to the point that my nose won’t unclog. I can’t breath at all through my nose and it’s driving me crazy. I’ve tried sprays to Help and nothing. And now taking deep breaths I’m struggling. I feel like I’m suffocating and I’m starting to panic.