Will my lungs ever be healthy?

Well, I see all these commercials talking about how bad second-hand smoke is. And although I’ve barely ever touched a cigarette myself, I’ve had second-hand smoke around me nonstop for about 20 years now. I did smoke alot of weed in high school also, on a semi-related note. I don’t know if the constant smoke has played a factor in my anxiety or anything other problems I have right now, but just in general.. I’m wondering if, after all this time, it’s even remotely possible for me be healthy. Will my lungs ever fully recover? I can’t even really breathe automatically. I have to do it manually, it seems like. Hopin’ for some good news..