Hello there. I can sympathise with trying to get help on the NHS. I managed to get Botox reasonably quickly, but getting any follow up or help after that was a nightmare and I went for surgery privately in the end. But it varies depending on where you live I expect and also it'd help if there weren't strikes and the government generally trying to grind the system into the ground...
Anyway, go to your GP, Chambers21, and ask them to refer you to see a specialist. If they can flag it as urgent then that'll help, so make a fuss (I did a lot of crying!). Or go to see a private surgeon (your GP will need to refer you) and then at least they can put you on the NHS list for surgery/investigation quicker. Or join Benenden who can get you treated sooner sometimes. I got offered an op through them much quicker than NHS but went for private because I just couldn't wait any more.
https://www.benenden.co.uk/Good luck!