I've been dealing with this cough for almost two weeks now. Initially, it was dry, but in the last three days, it's turned into a wet cough, and I'm able to spit it out. I'm feeling constantly tired and really don't have the energy to get things done. Mornings are especially tough because I can't seem to get up. On top of that, I've been having severe headaches all day long. I'm kind of worried about what's going on. Could you give me some advice on what's happening and what I should do?