The key right now, IMO, is to monitor yourself carefully and the moment you detect a fever - ACT! Not that your preventions are unimportant, but they may be too late. If you have a family physician (which you should!) you should call them right away and inform them of your exposure, ask their advice. They might choose to prescribe Ivermectin (human Rx form) or hydroxychloroquin immediately - or monoclonal antibodies: Regeneron.
Your OTC protocols are good. For zinc I buy Zicam, a sublingual form which is quickly absorbed; the directions on the box will advise how often to take it safely. Zinc is an immediate deterrent to the CoViD virus, the cold virus, perhaps any virus. Keep us informed. God bless! IR
ThanQs, Bob