I dont think the pain in the arm has anything to do with urination. You probably have some sort of neuralgia
or nerve pain
in one of the nerves in your arm. This is commonly due to compression or any trauma to the nerve. You should get your arm examined so that the nerve affected can be identified and if any causative factors can be too. Usually this is controlled by pain killers.
Going by your description of symptoms and ultrasound
examination, it seems you may have been investigated for a ureteric stone which may be causing pain. An investigation such as ultrasound will be able to confirm this and also the mode of treatment to be employed.
A urinary tract infection
is unlikely to cause groin pain and also ciprofloxacin
is not the ideal drug for it. Also you do not have any other symptoms or a urine test to confirm an infection which is necessary for you before the diagnosis can be confirmed.