Bike fit is a very personal, body specific process. Other than that, this is all opinion. Personally, I would not pay a bike fitter. One just has to be willing to try changes in the set up, small increments works better. I wonder, has anyone ever gone to a bike fitter and had the fitter tell them their position is really good and no change is necessary? Has anyone gone to one fitter, then gotten a second opinion from a different fitter? What were the difference from one fitter to the other? Do you discuss that with the fitters?

IMO, getting the saddle correct first is step one. It sounds to me like your seat post could be lowered a bit. A shorter stem would definitely help. I normally ride 53/54 cm bikes. I have a late 80's Ochsner road that is a 57 cm, I have owned since I bought it new in '92. I have the saddle forward to the max line, the seat post is at the correct height for me, and I have an 80 mm stem on it to shorten the reach. I am very comfortable on the bike. My issue with it now is that I have lost some height and inseam length, when I straddle the top tube , it is a bit too close to my crotch. In fairness, I do not ride this bike that much anymore, I have a couple other bikes that get most of the miles, and they are all a very good fit for me.

Another suggestion is to keep track of what you are doing to the set up and what does and does not work., and only do one change at a time. If the bike is a really poor fit, it may never be right enough to be comfortable.