So what's going on biologically that can make us feel so icky right before we bleed?
Some of the challenge is sheer hormonal shifts: just before we bleed, our hormones get to their lowest levels throughout the whole month. So it makes sense that our energy is lower than when are bodies are teaming with hormones. Luteinizing hormone surges before ovulation which contributes to feeling good during that time, and then sharply drops when the period starts. This can lead to fatigue, bloating, headaches and nausea.