I completed a second PCT to try to recover my natural test, and it was successful. I only want to use HRT if I need it - only after having made every effort to recover my natural test and still being low. I got my blood levels retested and I am now at 520, squarely in the middle of normal! An HRT clinc would still "help" me at that level, but it is no longer necessary now. So I decided not to do HRT at this time.
Looks like I have recovered from my cycle.
Strangely, even though my test and other hormone levels are normal, my sex drive is definitely a lot lower than it was several months ago. So it seems like something about my cycle has left a long lasting impact on my body. I would love to resolve that and get back my usual crazy horniness, but I'm not sure what to do next.