I just completed my dental impression using a different material yesterday to send to the lab for creating a tray. My treatment plan requires 30 tray within 13 months in order to make a planned retraction. The first tray shall arrive approximately 10 days from today. Quite excited, apart from the fact that I will lost 4 teeth soon.

It should be no problem to go for Invasalign in my case, just the major different between Invasalign and conventional braces are mostly (i) cost required and (ii) slightly longer time because it purely depend on patient's adherence to wear it while conventional braces is fixed on your teeth.
Also may I know the courses of your information regarding these aspects? Is it from working experiences or reading; because I might need your kind advise from time to time now. 13 months is not a short period of time

Just extracted 1 out of 4 tooth. Damn scary because my tooth root is quite long

Now I'd ask my friend to give me IM painkiller before crashing to bed. This gonna be a long, painful week.