First off welcome to the Ktva Course and forum from the UK. Your missing out on the student part of the forums click this link to gain access https://forum.kentamplinvocalacademy.com/discussion/6859/how-to-get-access-to-the-ktva-student-areas-of-the-forums#
The best advice I can give if your worried is seek professional medical advice just to put your mind at ease. Are you going hoarse at all over singing can swell the vocal cords if so rest is important for recovery.
3 months switch to volume 2 is fairly quick I was on 1 for 7 months before moving to 2 and another 7 months before vol 3. Don’t rush volume 1 spend a bit more time on it if you feel Your having issues on vol 2.
Doc_ramadani been very busy you should get a response from him Soon.