Tbh although I'm not a big fan of CBT, I'd say HA is probably one of the small number of complaints that respond really well to CBT (as others have said, it's closely allied to OCD which is definitely better treated with CBT than more analytic type of therapies - because both are not about the personal content of the thoughts, but about trying to control what are essentially random intrusions into your brain.) You should be able to self-refer to an NHS Depression and Anxiety Service locally, which will give you access to CBT (albeit with a long waiting list), or if you have the finances look for a private CBT therapist.