one thing's for sure: if your mass was found on a CT scan, then it's there. I would suggest you be really aggressive with these apparent doctors who can't seem to find this mass. As for the gang rape thing...been there. It's hard, I think, to be gang raped without at least one perpetrator who plays on your vulnerability. Someone has to lead you to the den, as it were. Gang rape is still not normal, thank heaven, but it is more commonly known. Fortunately for your psyche, you are not alone. It hurts me a bit to hear someone else has had similar abuse. I sort of have this hope that, while I'd like others to understand what I feel, it's not worth their going through it.
I've had a similar situation where I had a very small stroke, but it was not later seen by CT scan...thank heaven for that, as that meant no brain damage, which is my biggest fear. It was a slight blur on the MRI, so I ended up with proof that this had happened to me, but I had to insist. the concept of a stroke affecting my brain scares me like nothign else. My intellect gets me through the day when nothing else can. I am definitely a nerd, so the thought of losing any kind of brain function scares me. I have the belief that if I understand what is happening, on some intellectual level, then I will survive it. It's when it doesn't make any sense at all that I'm in real trouble.
Sorry for the aside. All I'm saying is this: if you have a symptom, then don't let them tell you it is in your head, especially if it is on the CT scan. Educate yourself about any other possible symptoms: problems with your period, odd pains about the time you are due to ovulate, things like that. Make them find it. And keep us posted.