Thanks for posting your query
From description it seems you might having TFCC(triangular fibrocartilage
complex) tear- ligament between distal radius, ulna and ulna and carpal bone.
I would suggest getting this evaluated by an orthopedician for an accurate diagnosis and appropriate management. You may get the X-ray/MRI
of the area affected under his/her guidance.
I hope this is helpful to you.
Dr Saurabh Gupta.