I weigh each morning under the same conditions.
Log it on a calendar above my scale and move on.
What is key for me, is at the end of the month, I take the calendar and my food/exercise journal, and look for trends.
Long term, this is very helpful.
3+ year maintainer.
The human body is capable of amazing things! But without the mind, it is nothing. Get your mind in gear and the body will follow!
Be selfish about caring for yourself, you deserve it!