A change in your voice and a heavy throat often point to laryngitis, typically caused by a viral infection, vocal strain, or acid reflux. Since most cases are viral, antibiotics will not help. I recommend resting your voice, staying well-hydrated with warm fluids, and performing warm saline gargles. For symptomatic relief, you can use over-the-counter throat lozenges or pain relievers like ibuprofen or acetaminophen. Avoid smoking and caffeine. If your symptoms persist for more than two weeks or if you experience difficulty breathing or swallowing, please consult an ENT specialist for a physical evaluation.