Period weight gain basically undos all of my progress! Do you gain weight on your period?

I've been trying to work out and watch my calories using MacroFactor since August, and I've lost about 5 pounds since then (125 --> 120 at 4'11)

However, since my period started 6 days ago, my weight has been sitting at 124 for DAYS! A part of me knows that it's water weight and because of hormones, but another part is freaking put because it has stayed so consistent an I will be sooo upset if it doesn't drop back to 121 or 120 in the next couple of days.

Do you gain weight and hold onto it during your period? How do you manage when it looks like it basically undos all of your progress?