I have advice, but you're not gonna like it
Water pills will actually make TOM-related bloating worse. Bloating comes from the mineral concentrations in your bloodstream being too high. Taking a pill to pull water out from your system is only going to increase the concentration, so that when you stop taking the pill, you bloat right back up again...sad but true. The best way to minimize water retention is to drink plenty of water.
That being said, my advice to you is to relax a little. The scale going up by 1-5 lbs for 2-3 days, when you ate on plan the day before, shouldn't freak you out. Our bodies fluctuate. It is the nature of the beast, and as you stay longer on this journey, you'll come to realize that sometimes, no matter WHAT you do, how hard you exercise, what time of the month it is, or what you've eaten, the scale goes inexplicably up. Learn early and learn well - if you are doing the very best you can, the scale should NEVER, in my opinion, make you depressed.