Why Do I Feel I am Unable to Empty My Bladder?

This might be a case of UTI. The patient should be taken to see a urologist or other general practitioner for proper diagnosis and treatment. Another thing that might give some relief is drinking a lot of water and avoiding irritants like caffeine and alcohol.

Please visit a urologist. Based on proper evaluation and diagnosis, the doctor will be able to determine the cause of your problem and suggest treatments accordingly. Also, to manage pain on your testicles I advise you to not sit for a longer duration and avoid the activities that worsen the pain. 

Hi, keep in mind that the high frequency of urination may be due to urinary tract infection, diabetes or prostate disease, just to mention a few. I suggest you visit a urologist or a nephrologist who will properly diagnose and treat you. It is better to go for medical consultation rather than take self diagnosis or symptoms lightly.
 

Using condoms correctly and consistently greatly reduces the risk of contracting sexually transmitted diseases/ STDs. But still condoms might not offer absolute protection due to factors like skin-to-skin transmission and condom breakage.

It can sometimes be challenging to differentiate between a UTI and an STI based solely on symptoms. Both UTIs and STIs can cause similar symptoms such as pain or discomfort during urination, frequent urination, and an urgent need to urinate.

Phimosis, on the other hand, is a medical condition when the foreskin cannot be easily pulled back over the head of the penis. Such problems may obscure the urine flow and cause discomfort as well. Treatment can include the application of a steroid cream which the doctor will prescribe. The treatment will not only help the foreskin become softer but will also allow for its easy retraction.