I've been dealing with this annoying dry cough ever since I recovered from a fever and cold last week. It feels like it's coming from deep in the lungs and has a lot of force behind it. I've been taking chericof for three days now, but it hasn't helped at all. I visited a doctor, got an injection, and he prescribed some meds, saying I'd feel better by the next day, but there's been zero relief. It's just this relentless dry coughno fever, body pain, fatigue, appetite issues, or high blood pressure. Do you have any idea what's going on and what I should consider doing next?