Retaining water! Ugh!

I ran out of one of my medications (for the acne caused by losing weight) and one of its side effects was dehydration. Since I ran out a few days ago, I've gained 2 lbs of water weight; I know it's water weight because my fingers are stiff and a ring I wear on my right hand is tight when it is normally pretty loose. I've been drinking lots of water to try to flush it out but so far, nothing. I am refilling that prescription today and hopefully that extra water should GO AWAY!

I've been so good with workouts, going to the gym, my diet, etc. It's FRUSTRATING.