Wow...this is going WAY BACK to when I first went on T in the 1980's!
I think I noticed a distinct cracking within two weeks....it felt funny, just like a guy going through puberty....within a month it had stabilized at its new level....suffice to say it happens quickly.....

If you're not a singer, in the singing-alone-in-front-of-people sense, how do you figure out your vocal range?  Beyond just figuring you probably sound like a girl or a guy depending on what hormones are currently in your system?  Voice does not sound like a stringed instrument or a piano, not that I can match the pitch of one of the latter to the other (yay electronic tuners), but I'd like to have *some* idea of what my current singing-in-the-car-when-nobody's-listening range is, for a baseline measurement.  Can you just sing into one of the tuners for any instrument, and have it tell you?  (I've clocked streetcars at what must be a very low B, so it seems theoretically possible, to my non-musically-trained mind)  Or do you need lots of musical training to be able to find out anything at all?