My SIL picked up a top-end mountain bike for half-price from a female racer that gets a new bike every year. Anybody on the team that's your frame size?
With ortho issues, you might want to visit a bike shop and get their opinion on what frame size you should be on--apparently what they recommend has changed over the years. My current bike is several sizes different from my original hybrid and its PERFECT!
You might also consider consulting a reputable bike shop for a fit again, unless your PT specializes in cycling. My DH thought he could read an article and do it himself, but the tweets made at the bike shop were the BOMB!
Good luck!

