Hello, I have pain in the lower left abdomen and left testicle that lasted about three months. Ultrasound negative for hernia. More comfortable when distending stomach. No other symptoms.

Here are some... At least, it is nice to know what you experienced is not life-threatening but it is still a good idea to figure out what may have caused all your symptoms. Fortunately, it is not that hard to figure it out correctly by following instructions described in https://ebettercare.com/feel-become-sick/. Then you become knowledgeable to work well with doctor so to reach right diagnosis for right care.