OVER THE PAST WEEK OR SO I HAVE NOTICED I AM URINATING AT A VERY FREQUENT RATE..USUALLY EVERY TWO HOURS OR SO. AT NIGHT ESPECIALLY. I ALSO NOTICED EVERY ONCE AND A WHILE ILL HAVE DULL PAIN IN MY LEFT LOWER BACK. NOT SUPER PAINFUL, ALMOST LIKE IT FEELS LIKE A PULLED MUSCLE. SOMETIMES I FEEL LIGHT HEADED TOO OR CONSTANTLY WORE OUT. I WAS JUST WONDERING IF THIS IS SOMETHING SERIOUS IF YOU WOULD KNOW, OR AM I WORRYING/.