welcome! Remember the scale can fluctuate a couple of lbs either way depending on time of day, clothing etc.
Good luck on the water! it took me a few weeks to work up to the 10 glasses a day , now I'm drinking 4 24 oz bottles minimum! My only suggestion on it is make sure there's a cup or bottle with you at all times. That's the only way I do it.
I have a 24oz bottle in the morning before I leave the house for work. Then 2 more at work and the final in the evening. I bought myself a nice Thermos brand Intak bottle off Amazon and keep it full.
Good luck with your journey. My sweetie and I are trying for a baby too, we miscarried in July which was very tough but I know I'll get pregnant again.