I havefrequent urination in large amounts and I have had a negative test for a uti?

Get checked again. Frequent urination of a full bladder can be a symptom of diabetes. Best to follow up with your doctor to find the cause of your symptoms.
? Large intake. What goes in in form of liquids must come out, mostly as urine. Frequency of urination can also be due to an overactive bladder, stress, anxiety or caffeine intake.