Hello. I'm a 43 year old male and have been singing for most my life. I studied music in jr college where I took many voice training lessons and learned several voice exercises for warming up, cooling down, strengthening the voice, breathing exercises ect... ect...ect. however, knowing all the right and wrong ways to sing never stopped me from becoming an 80's style heavy metal singer. Up untill about a month ago I have never had any problems with voice fatigue or harshness of tones in my voice. But about a month ago I had a terrible cold with a sore hroat and bad cough but had to perform a show regardless. Needless to say, After the 3hr show my voice was trashed. This was by far the most punishment my voice has ever taken and for the first time ever It didn't recuperate over night. In fact its been over a month and my voice is still raspy like I have a cold but I got over the cold about a week ago. Now when I sing it feels harder to controll my breathing and my lower range sounds raspy like I need to clear my throat. My upper range still sounds ok but feels less controlled and has a tendency to bend off pitch if I put much power behind it. Im hoping I still have a bit of cold yet and that it'll all be back to normal in another week or two but I'm worried that I may have done some real damage to my voice during that last performance. Any thoughts or suggestions would be greatly appreciated.