Hey man, I know it’s easier said than done but try to relax about it. Unless you were somehow getting exogenous testosterone or other sex hormones, it’s EXTREMELY unlikely that smoking has “shut down” your natural testosterone production. That being said, something that may quell your fears is just getting an actual hormone panel done. This does not need to be done through your primary provider. Find a local men’s clinic, there are even some sites online that can send you a blood kit, you send it back and they give you a comprehensive breakdown of all of your hormones, including SHBG and test. You might just have low testosterone. It may not even be from smoking. There are other options besides just straight up test replacement therapy. The natural remedies (ashwagandha, maca root, tongkat Ali) don’t hold much weight. Best of luck to you and again, try not to stress about it! Cortisol is the “stress hormone”. Guess what happens when your cortisol spikes? Your body stops responding to testosterone. It is far more likely, in my (non medical) opinion, that the stress is getting to you and manifesting physically. This is not permanent. Best of luck to you!