Index Finger A3 Pulley Diagnosis

Hello Last week I did a reachy move to small undercling and first got it only with index finger’s first (distal) phalanx and only then grabbed it with the rest of the fingers. I felt something moved inside the index finger but ignored it, there was no sound heard. The finger got a little swollen in an hour but I felt no pain just stiffness. The next day morning the entire finger was swollen and I couldn’t bend it all the way. After couple days of icing and NSAID application both pills and cream the swelling stopped. I still can bend it only half way and I found small bump on the top of the first joint (see picture). Any idea of the diagnosis? I will see a specialist for ultrasound examination but as it is summer it may take a while and I would like to start treatment as soon as possible. From what I found it may be A3 pulley partly or complete rupture. I immobilized the finger with tape but not sure what to do next. Any advice will be highly appreciated. Thank you PS: I posted the same question at rockclimbing.com Normal 0 false false false EN-US X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman","serif";}