A1 or A2? please help!

Hi Doctor, I was climbing a route with the crux coming at a mono pocket.  I had tried this route many times and was quite fatigued coming in to it.  I felt an immediate twinge in my middle finger.  I stopped climbing and went home very depressed to have another A2 pulley incident.  I can evoke a pain response with a open handed grip with the effected finger. The pain is far less if other fingers are added to the stimulis.  Full crimping actually feels ok.  I have never suffered a finger injury using an open grip, so I am not familiar with this.  Is it possible this could be a A1 pulley?  If so is rehab going to be any different than a2? Thanks, Luke edit: no swelling or bruising, full range of motion with mild pain.  severe pain and weakness when finger is used alone in an open grip.