It can happen at any age - I was diagnosed aged 49, the week I was due to run a marathon, so you can probably imagine my shock
😱 I went from feeling ready to run 26 miles to feeling everything was falling apart

Thankfully, I was able to teach myself how to manage it well and nearly 14 years later I am doing well
🙂 It hasn't impacted my general health greatly, except probably for the better, as I have been much more aware of my health and looking after myself than I might otherwise have been - so there are some positives!
🙂 I was probably in a similar position to you, in that I had symptoms for months prior to my official diagnosis, but I put them down to other things. Everything came to a head when I caught a virus and it simply overwhelmed my body's ability to cope any longer and I ended up in hospital. From reading others' experiences over the years it does often appear to be a much slower and more gradual onset the older you are, which can make it difficult to get a definite diagnosis sometimes, although there are tests that they can do.
Wishing you well, let us know if you have any questions along your journey
🙂