I had a fever yesterday. My body temp was around 101°F and my voice was fine. But this morning when i woke up, I couldn't even speak. Sore throat and mucus in my throat. Then I successfully clear out the mucus tht's preventing me from speaking. My voice returns but I just know tht something is wrong with it. My lower register sounds good but once i reach around A3 or B3 I sound not airy but squeaky and just not right. I have a cough too. Is it something serious or something tht will recover over time?