I have the same problem. Not that I can carry a tune, but it's still fun. I only found your post because I'm trying to find a solution too. I was wondering if I'm just singing wrong, like I can talk find, what's the difference if I sing. am I doing it wrong?
My voice changes after just a couple of songs. No power, and can not reach relatively easy notes. I have swollen lymph nodes at the end of my jaw below my ears. Both sides. My whole neck felt like it was swollen. Could this be a result of my medication for acid reflux? (Rabeprazole ) Does acid reflux cause swollen lymph nodes in neck area?