When you say 'misdiagnosed as a Uti', that's unusual as they check urine samples for bacteria to diagnose a uti typically. That's not the case for you? Unfortunately I don't think we're going to be able to get real answers for you as you need examination in order to dig deeper to what is happening. This article talks about 8 potential causes of testicular pain. https://www.medicalnewstoday.com/articles/324776 You were checked for things like a hernia? There is epididymitis but you took antibiotics when you thought you had a uti? Are you sure you don't have a recurring UTI?
So, chronic prostatitis. Possibly. https://www.mayoclinic.org/diseases-conditions/prostatitis/symptoms-causes/syc-20355766 You'll need a urine test, blood test and exam to determine if you have this. They may even choose to do some imaging. Can you take Nsaids for comfort (like ibuprofen?)? That's often given but antibiotics area as well.
Will your doctor provide some guidance over phone or video if your area is under lock down right now?