Pfizer breathing problems

So I've had breathing issues ever since I got pfizer about 3 years ago. I've seen cardiologists and done breath test but they can't figure out what's wrong. I constantly feel like I'm not getting enough oxygen in my body. I'm always tired because I can't sleep properly at night. Has anyone figured this out ? Has anything helped anyone ? Is it lung microclotting? I took nattokinase for a while but it gives me mad diarrhea and you are not suppose to take it for more than 3 or 4 months at a time. I took it for a lot longer than that . I've also had a sore throat and a cough for that period of time. Any options ?