Why R your GP appts difficult to get, is there not an on-line triage system?
Dizziness can be due to low oestrogen I believe.
How is your diet overall? I've had Omeprazolol for years which helps the reflux, however I've altered my diet over the last 2-3 years. Hidden sugars: i.e. in chocolate/drinks, [beet] sugar in tea = an annoying clearing of throat cough; I found that croissants, scones and shop bought cake made me bloated ........ those symptoms have, in general, eased.
Low oestrogen may be causing the tinnitus of which we have several threads here, getting a hearing test at least will tick that box. My ears feel bunged up all the while, occasionally I can wriggle and they clear. Mine noises seem to be behind my head

and DH can't hear it!
U may require a hike in the HRT, what R your periods up to? Take a list to your various appts.