So close to giving up

Just need to get this off my cheast. I have ADHD (undiagnosed and unmedicated, because I am still on the waiting list after 1 year) and I managed just alright over the years. But since the past few years I have been struggling with memory loss. I am just in my mid 40's and I would be lying if I say it didn't scare the s*** out if me. I can't remember things people tell me. The amount of times someone tells me, that they already told me something and if I don't remember, are uncountable at this point. I had to stop reading book because I'm not able to comprehend things anymore, and I loved to read. I read all the Charles Dickens books in english and it isn't even my first language. And now even simple things are a challenge. Since the beginning of this year I suffer from pressure on my cheast and lump in my throat on top of that. I have been to doctors done all kinds of tests and all come out normal. I just don't know what to do anymore. I can notice how it is getting worse and I feel so helpless. I literally just feel like giving up because I can't get a doctor to listen. I'm at a point where I just feel stupid for even asking and trying to find a solution. Thanks for reading and thank you for your comment. @T Thank you for your message. I was told by the disability advisor and my GP who tested me for dyslexia as well as ADHD that I have ADHD not dyslexia though. I have most of the symptoms. Even though both of them agree that I have ADHD they aren't in the position to give me an official diagnosis and with that I can not get treatment. But because everything goes trough the NHS here, there are waiting lists that are over a year long or else you go private and that is way to expensive. @Marie Thank you for your message. I saw a Neurologist and she insisted there is nothing wrong. She made a few memory tests and came to conclusion that all is good. And because there is no early dementia or strokes in my family she says it is unlikely that it's that. @Mommaof4 Thank you for your reply. Is was also thinking perimenipause only when I said that the dr told I'm too young, which clearly isn't the case. Meaning I have to have another appointment again with a different dr. It's just so boring and they are trying to force anxiety medication onto me even though I don't have anxiety. But then they like to do that with women anyway. But again really appreciate your reply.