I'm one of those people who's in their 30's and still struggling. That's largely due to me not getting ANY help or support until I was 34. That's the thing I'd say to people who have just developed this phobia - get help straight away! I firmly believe that the longer you leave it the harder it is to get better.
There's always hope though. I struggled alone for 23 years before getting help and a years worth of CBT has definitely improved things. There's lots of things I can do now that I couldn't do before.