When I first started T, a couple of weeks in I noticed that my upper register was becoming harder to control. There weren't any detectable differences in the sound, but it was more difficult to steer... Then it started breaking, cleared up in three days, started breaking again, the cracking lasting for a couple of weeks, then slowly stabilizing and clearing up again... I'm at a point now where it seems relatively stable- during the last break, a lot of my upper range was not usable (absolutely no sound would come out, or it would be accompanied with a shrill honking/shrieking noise) but I tried to just sing every day regardless of how terrible it sounded.
Naturally if your throat actually hurts or the strain gets real uncomfortable, give it a rest. But even if singing through it doesn't help you 'retain' more(I've been told that it does) it *will* help you stay familiar with your voice as it changes. I pulled out of the last break with the notes that were unusable slowly returning. If your throat is feeling sensitive/scratchy, a tea made of slippery elm will help(it's sold as 'Throat Coat' from some wellness brand, comes in teabags) as it contains some natural mucilage that will lubricate your throat.
For anyone else reading this... As described above, I've had numerous small breaking periods and so far one longer one. Is this the type of breaking that usually happens? I'm wondering if I should be expecting more breaks after this. I'm at about four months.
How long does it usually last?