Pain over kidney area with radiation to groins is a symptom related to renal stones disease...it may be rarely infection (because u are saying no fever and no burning urination). There is no need to panic but u need to have an Ultrsound abdomen done and complete urine examination to look for any stones and infection. Serum creatinine levels also should be done to find out if the problem is causing any functional derangement. Don t let days pass on as u have to react to the condition which is treatable that prevents further damage .