Improve my singing voice

I would really love to improve my singing voice. I used to be able to sing anything i wanted too. Whether it was soprano, alto, bass, whatever it was i could sing it, then one day i was practicing for a performance and I felt one of my vocal chords pop. It hurt really badly but i ignored it cause i had this performance the next day. So the next day i did the performance and some other really loud unexpected perfomances and lost my voice. So i started doing a self therapy, i stopped singing for two weeks, and i drank alot of hot herbal tea’s and stuff. But that didnt work, occasionally the pain will come back but my main problem is when i sing now my voice goes out where the only thing you can hear is an airy sound like aaaahhhh, it sounds like im blowing air out off my throat. It is so irritating because it just makes me wanna cry everyone used to say omg you have such a beautiful voice. Now i wont even sing a lullaby for fear of that airy sound. Then i joined the choir thinking they would be able to help me but i have another problem nobody can hear me at all. They say im singing barely above a whisper but i feel like i’m yelling at the top of my lungs still no one can hear me its very frustrating i have tried everything but i cant find anything that will work.