From the opg we can figure out that the wisdom tooth is supra erupted. The opposing tooth is also not present. I would advise extraction of it since its symptomatic and causing trouble to you. Since the lower tooth is not present so this tooth is not helping you in function, it is just giving you trouble.
Next Steps
Get the upper wisdom tooth extracted.
Health Tips
Relax, don't stress too much about it. Don't postpone it more.