Is my symptom related to IBS?

For about half a year, I've been suffering from having watery(clear) diarrhea.
Whenever I consume liquid (water, soda, juice, tea, or coffee), it comes out as diarrhea. I seldom has an urge to pee (and when I pee, only small amount comes out).
In the morning, I have constipation but in the afternoon, I'd have diarrhea.
When I consume almost no water, i have no diarrhea.

Is this somehow related to IBS?

about 2 cups (12 oz/cup)

I take no fiber supplements or eat a high fiber diet.
I don't usually even eat vegitable.