Did your doctor diagnose PTSD? What was his treatment plan for you? If it's your GP ask for a referral to psychology/psychological services which he should do anyway if you've been formally diagnosed.My doctor is now aware however, told me unless am ready to jump off a bridge and as am not a veteran (soldier), I won't be able to get help.
What makes you think you need a variety of specialised services? What services do you think you need and why? I'm not saying you don't but a good therapist/counsellor can take you quite far - and most in the uk will give you some feedback/response so if this one doesn't fit, ask if you can see someone different, it's not at all unusual for people to see a couple of counsellors before finding the right person for them.
Going to a rape centre/abuse recovery place is a very good start, they'll have the knowledge to support you and help you start to pick your way through this.