Bike Position

Unless you feel like something is injuring you, I would give it more time.  I went through the same thing when I went from a very slack road bike to my tri-bike and it took a while to adjust.  And don't mess with the fit yourself unless you want to pay for another one

Okay..  Thanks for the input..   I would rather stick it out a bit more anyways then pay for another fit 3 weeks after my first fit.. lol

x2. One of the (many, many) reasons to support your LOCAL bike shop - they'll almost certainly tweak it for you for free. Give 'em a call.

Did the fitter ask you about your cycling experience, your goals, any known problems, etc? If not, they may just have put you in a very aggressive "racers" position... I would almost take for granted that they will do a follow-up fitting (or adjustment, call it what you want) for free. Any good fitter should do that. I say go back to the fitter and discuss your discomforts with him/her.

From your comment about fighting to keep your head up, I am going to assume you have a tri bike.  I had the same problems with my neck for a while when I bought my tri bike, but they went away after time in the saddle.  It probably took me about 200 miles or so of riding.  One thing that helped me through this period (and I still do this before a long ride) is taking about three aspirin before I started my ride.  Makes all of the little aches and pains that seem to present themselves a little more tolerable.

Make sure you aren't letting your head and neck 'fall down' between your shoulders making your shoulder blades come closer together.  I was doing this and it was giving me a sharp, stabbing pain between my shoulder blades after about 20 miles.  I also started doing some lower back exercises in a Roman Chair and I think that helped a lot as well.

FWIW,
Greg