So tell your GP how you are really feeling, lay it on thick if necessary! R U able to make a double appt., perhaps at the end of the day to discuss these symptoms?
Why didn't the GP follow up, letting U know that they had received the letter? As for seeing a gynae., hormonal blood tests are reliably un-reliable. MayB it's time to get a referral to a dedicated menopause clinic?
Seems common not to contact the patient: 2 years ago, DH went for an x-ray on a painful knee, as there was 'nil of note' the message went back 'no further treatment required'. Well mayB tell the patient?

ask if symptoms have eased?
Let us know how you get on. Don't give up!