I'm also 58 and, while I don't do EMDR, I do work on childhood trauma issues. I don't think it's ever too late.

Look at it this way. In five years, you'll be 63. Would you rather be 63 and still be struggling with a lot of the same things you're currently struggling with or would you like to have put at least some of them behind you? Either way, you'll be five years older. You might as well be older and be struggling a little less and understanding a little more, don't you think?