Hi Dear !! Thanks for your query to HCM.
I understood your health concerns. 
My Impression-
AS the history and query facts are incomplete, I would suggest you to assess your case from -Surgeon / Orthopedic surgeon.
As there is pain in 
scrotum you would need evaluation from 
Urologist also.
In My opinion - it could be from adductor 
Muscle strain injury,which is near scrotal area.This could be resolved after proper check up from Surgeon/ Orthosurgeon.
Pop up feeling you had could be from -muscle give way injury or from any damage to 
inguinal canal contents going to scrotum and needs to be verified after physical check up from Surgeon.
USG / colour doppler would resolve if Scrotal contents are injured.
Hope this resolves all your queries to your satisfaction.
Keep Me updated whenever needed , 24 x 7, to help you out by even,online tips for You, on weekly basis. 
Welcome for any further query in this regard.
Good Day!!
Dr.Savaskar M.N.
Senior Surgical Specialist
M.S.Genl-CVTS