I have similar problems with Testicles drawing up in the morning , anyways you might go to Dr and get antibiotics .
So what just be proud of it, some guys would kill for a bulge ok, if you think your shrinking then try some jelqing to help cure your shrinking p***s and do some ball streching to help cure that or you can get a strecher from myhardwear, as for jelqing just go to pegym, ther you can do the beginners page, to get you going.
Good luck
Hi there you may like to try Boxer briefs , the tightness of your ball bag maybe due to the temperature , take care ........Bob