Hi welcome to Health care magic forum.
Thanks for calling H.C.M.Forum.
You have pain in the back, around kidney
area,feel sick, and head ache. Always feel like urinating, and it is difficult.
It is urinary tract infection
,and also appear there is pelvic inflammation as well .
I advise you to consult a surgeon for diagnosis and treatment.You may need to have M.R.I.besides other routine tests for confirmation.
Wishing for a quick and comfertable recovery.