How does comp work

I’ve been playing comp and corrently i’m silver 2.
I’ve wont 7 games but had two loses and 1 draw and i still didnt ranked neither deranked.
Ussually i would rank up or at least that’s what’ve happened before, is comp rank up messed up or i it normal?
I would appreciate it if someone could tell me how comp rank ups work!

Probably you kept the same rank you already had. Even though you won more, you still have a hidden mmr so maybe you won against low elo players