I knew someone years ago who had it done on the nhs. It took her a while to convince her gp that she was not acting on the rebound after her husband's death. In fact, she had made up her mind long before her husband became ill, but had not acted on it because her husband did not want her to. After her husband's death she went to her gp with a sense of relief but was told (patronizingly) that she was only acting on the rebound. However, she persisted, and after a while (not sure how long) she managed to convince him. At least this is the story she told me. So I think you should try your gp, and be prepared to be patient but persistent.