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1.Sagging of the testicles can be a normal condition - as the scrotal sac does changes consistency according to the temperature,
cold the sac more of stiff, in hot weather more of sagging.
2.Yes you are thinking much about that so feel so, try concentrating on some thing to forget about it.
3.If there is no pain, discomfort there is nothing to worry about.
4.If there is any abnormal findings you feel when you palpate the testis bring to the notification and
seek medical help.
5.You are fine there is no problem, enjoy the life and time. Good luck.
Hope i have answered your query.
Any thing to ask do not hesitate
http://doctor.healthcaremagic.com/doctors/dr-ganesh/62888 Thank you.