I've been raped twice. One they went to trial with, but I wouldn't give evidence so it was dropped for lack of evidence, the other one the CPS refused to proceed with charges on, on the basis of lack of forensic evidence - so a he said/she said.
TBH the first was more traumatic and I possibly had a chance of getting a conviction, but the second wasn't nearly as traumatic for me - it wasn't a stranger violent rape, so I was a little disappointed at not really being believed, but not terribly so.
The problem is the intrusion into your life and the prolonging of reliving it, while you should be trying to recover from it. You're actually at your most fragile after a particularly traumatic rape - emotionally - so for me personally I literally couldn't physically get to a police station to make a statement as I kept vomiting. I actually began to recover when he was jailed for another crime as the fear of meeting him again wasn't there.
Police do try to support you, but the questions they ask you are all a little bit 'did you try to defend yourself', 'could you have consented' etc. etc. A bit victim blamey. I suppose in an attempt to see if the case would resist a trial. But it is traumatic.
Having read coverage of some rape cases, in particular one in Northern Ireland where 3 rugby players were accused and acquitted of the rape of a 19 year old I think, I really wouldn't recommend women go through with it. Not unless you're at you're strongest emotionally (which you're unlikely to be).