Frequent urination could b due to any Urinary Tract Infection(UTI);Prostatitis,
Diabetes,Incontinence of urine due to lax muscles of Urinary bladder r any loaded pressure,sometimes due to psychological obscessions also it may happen.So to exclude, one should undergo related tests for proper T/t.
If ur Intake of water is more,then obviously Output also will b more.If in that case,U can once try by lessening intake of water quantity& observe.If its not there on that day,then u can consider as nothing abnormal.