Don't know when I became deaf but medication did destroy my hearing when I received medication shortly after my birth in NICU.
I was diagnosed with a bilateral severe sensineural hearing loss at 9 months and my left ear progressed to profound at 10 years old and my right ear progress at 12/13 years old.
No hearing in left ear. Right ear has a 90+ hearing loss.
Grew up with hearing aids to help me hear, I got the cochlear implant to hear environmental sounds, to be safe and also to hear when someone is talking to me(i dont understand speech mostly only when I lipread), also to cope better as I am from a hearing family