Hello2
If it’s any consolation I also hang lower on one side. My right hand ball is larger than the left probably by about 50%. I noticed this long before I started PE ing. In fact it concerned me so much so that I went to the Doc’s who refered me to hospital. To cut a long story short, after ultra scan the conclusion was that some kind of damage had been caused in the past maybe from a sporting accident, or maybe trama from vascetomy. Anyway it has not got any larger in the past 3 years.
Try self examination in the shower, if you can feel any small lumps, pay a visit to the Docs.