finger tendonitis or pulley injury?

hi dr 8a in april of 2007 i injured my right ring finger whilst bouldering.it wasnt a sudden injury but more of a gradual increase in pain over a week or so.i wasnt very clued up on finger injuries so just taped it and carried on climbing(stupid) until the stage came where it was just to painfull to climb.my finger was then swollen at the bottom making it unable to bend and touch the tip to my palm.swelling went away after a few days.went to a hand specialist who gave me a cortisone injection which really helped with the pain and said he thought it was probably a A2 pulley injury but he did no ultrasound etc and i started to climb again with tape 2 months later.it felt fine at first but after a while the pain started to come back.there is no pain when hanging open handed on hangboard but if i crimp or squeeze/grip wide objects(water bottle,grinder etc it really hurts mainly at the pip joint and then it will get very tender and pressure sensative at the proximal phalanx.i injured another finger(middle right hand,repeatedly trying the same move but didnt know finger was injured until the next morning when i woke up,was painfull to bend) (same pain etc) and took 4 months off completly from climbing and it now feels like it on the road to recovery but my older injury didnt heal in this time.its at a point where its not getting better or worse.also when i bend the finger back it makes a grinding type sound and feeling in the prox phalanx.any ideas on what the injury might be.should i go back to hand specialist and if i had to get an ultrasound scan would it definatly show if i have tendonitis or pulley injury.thanks alot.appreciate your opinions. mat