Hi there, not sure if you have read my story but I too was raped infact gang raped by four men, this only happened in january this year and I too haven't really spoke about it.
They often say that we can be in shock and that one day it will come out of us. Just because you didn't feel anyhting before now doesnt't mean anything bad. It is now your mind is wanting to start dealing with it. I haven't done it but I think you should go for some kind of counsilling.
Take care my friend and feel free to email me netime, I am a mum of two boys from scotland(23)