Lol I can't believe I wrote in my first message ''i have no hair in my mouth''! What an idiot.
Ok, Bryanna today I called my dentist exposing my issues and he said those red marks are the granulation tissue that will turn pink sooner or later (I told him I have no pain).
Anyway, he said that if I would he could take a look at it Monday (despite he thought it wasn't necessary)
I must admit now I'm a bit confused: shouldn't a healthy granulation tissue be just pink in colour more than two weeks after?