Consistent blockage in airways for 2 years, seeking advice

Hello, I am not diagnosed officially, but it is the closet that describes what I I've been going through for the last 2 years now I've been dealing with consistent blockage in my airways, sometimes it gets extreme and I can't get a full breath for 8-9 breaths in a row while most of the time ranges from 2-4 breaths without being able to take a deep breath. I pass all breathing/ashma test I pass all X-rays, I passed ct scans. I tried to take inhalers hoping that it would fix all of this but they all have made it worse so I had to stop taking them. I want a bronchoscopy done to see what is going in my lungs but I've been rejected anytime I bring it up, with no other type of treatments or solutions. I can't work and a lot of times when it gets bad I can't even drive a car. I know no one is a doctor here but I would be very curious to find out how someone with similar symptoms have delt with this. I almost forgot to add, this started happening around Feb 2020 as a side effect that I got after taking a stimulant pre workout for about 3 and half weeks. Thank you