My dearest Gabriela, I wish I was in Doha, I would come straight round to see you and come with you to the police.
I had something very similar to this happen to me 20 years ago and I never reported it to the police, and to this day it haunts me that the scum got away with it.
Last March I was raped again and this time I went straight to the hospital who contacted the police.
I know I'm in the UK so it's different, but you REALLY have to go. Just because you are going late doesn't mean it didn't happen and these scums can not be punished.
If nothing else at least their names will be on file and if anyone else reports them it will be helpful to them.
As you didn't report it, they are bound to do it again and again till they get stopped and I'm sure they've done it before too.
You MUST get checked out at the hospital for STD's too. It's all very horrible and traumatic, but you must do it, if not for yourself for others you may infect.
Stay strong. and know Allah will punish them even if the police do not.
Hugs
Khadija