Help!

This is the only place I could find that I thought might have an answer without having to pay a specialist all of my money. Everywhere else is full of puberty woes.

I am a male signer in my twenties. I have been out of practice lately, college isn't in session, and I don't have anything locally to work on. Suddenly, however, when finally beginning to practice again, I noticed a dramatic decrease in my vocal range. My head voice and falsetto are gone, replaced with squeaks and croaks.

My regular voice is fine, however. there is no pain or distress. as i said, I haven't been using them lately, so it isn't misuse. What is wrong with me?