Undulation
Ups And Downs, Highs And Lows
noun, verbal noun
Wake up, now lay yourself down, now wake up again, okay now lay again. What you're doing is called undulation. If your emotions do it it's called ups and downs. Everyone goes through stuff like this sometimes.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
生理前はどうしても感情の起伏が激しくなってしまう。
Before my period I always get violent emotional ups and downs.