i feel like the voice drop is progressing. comparing a recording of my voice from last week to this week, i can hear a difference (if anyone wants to hear i'll pm it lol). anyone else experience more rapid change during this time? i've noticed that a portion of ftms have their (initial) drop at 4 months.

Yeah I just had another drop two days ago and I'm almost 4 months on T. I'm now 90-100 Hz when before I was jumping from 100 Hz - 120  Hz.
I sound like Satan in recordings. XD

Yup, 3-4 months was when my voice changes became noticeable and obvious to others. I had another drop in the 6-8 month window, then again at about a year. Roughly 2.5 years on T, I think my voice is done with any major changes, but it's continued to mature in some ways (as everyone's voices do with age, cis or trans). Thankfully it didn't take very long for me to leave the squeaky teenager stage.