It's been a month since I began only eating one meal a day, and I thought I'd share my weight changes

Week 0: gained 6 lbs (this inspired me to only eat one meal a day)
Week 1: lost 9 lbs.
Week 2: lost 6 lbs
Week 3. gained 3 lbs
Week 4: lost 10 lbs

I think week 3 was water weight. I'm not sure what to do. I could buy water pills or just accept that I might gain weight once in a while but that it will probably reverse by the next week and it will all average out in the end and not sweat it.