Do i need to see a doctor? the last three days or so my urine has been way darker than i feel is should be because i am drinking a minimum of 64 oz of water a day. it sinks to the bottom of the toilet but is clear on top?

Urine color is also affected by what you eat and other liquids you drink. If worried too much get a Urine test

It is not unusual for urine to be dark, depending on what you eat and drink, but if you persist in having your own that you feel is unusual for your circumstances, a urinalysis will often give an answer. See your primary care doctor for testing. Good luck.