That burning sensation can be from cystitus (Spelling?) it burns when you pee and makes your urine strong.It is quite a common infection and women tend to suffer from it more than men.You can get creams over the counter for this but you need to know that it is that.It is normally passed onto the guy from the women and is also lovingly referred to as "Honeymooners complaint" Either way get it checked bro but it could be a harmless infection or at worst STI.