A family Doc right? Without pushing your range with the addition of joint mobilizations you will only scar down and loose mobility.
A sport orthopedic MD would advise you otherwise knowing that Doctorate level trained PT's will 'grade' your stretching and joint mobilizations within the tissue tolerance which would result in a radically different outcome than you are experiencing currently.
If you can replicate self joint mobs that you've been instructed in, perform self traction and stretching done in the clinical setting that would suffice to go on to a home program, but your 'home PT' methods don't seem to be very effective at increasing your range of motion.
Just trying to help and provided some evidenced based clinical advice!