Sounds to me like your current fit can't be too bad. I haven't changed my fit on my single in maybe 15 years, nor changed the fit on our tandem since we bought it in '07. Of course I've changed my saddles a few times, which always involves height adjustment and the re-imagining of what "level" means for a saddle. And which doesn't mean I haven't tried different things to see if they improved anything, but no, they didn't. Fool around with it if you want to. As long as you know your current measurements, it's easy to go back and who knows, you might learn something new.

I've never gone to a fitter. Why would I want someone else to tell me how to perch on my bike? I can easily tell what makes me fast and powerful on a bike.