The one with obvious changes

I started taking my medication pills three weeks ago and my OB-gyne mentioned that since it's a planning pill too, there are effects that might take in place while im under medication.  Im not used to drinking medication, so she gave me a heads up about the water retention, the mood swings (err) and some breakouts if my skin will have to adjust to it too.  Good thing i did'nt have to buy those acne vitamins since i did'nt have any breakout at all. But the water retention is showing some signs already.  I also feel thirsty always and in the "mood" to eat. haha. i dont think it's the pills taking effect. (might be myself alone who'd like to eat)