4. Changes in your mood
Another telltale sign that estrogen levels are dipping is a change in your mood. Estrogen itself is a hormone, and this hormone has a direct effect on other hormones that your body produces; and all of these hormones have a significant impact on your mood. This explains why you probably feel like your mood is on a rollercoaster ride when each month when your menstrual cycle is due to start, or when it begins, and why you start to feel more balanced when it ends.
While all hormones can impact your mood, estrogen, in particular, plays a significant role in the way that you feel. That is because this hormone influences the parts of your brain that help to control your emotions, including the production of endorphins (the “feel good” chemicals your brain produces) and reduces production of serotonin, which directly affects your sleep (and when you’re sleepy, you tend to be more irritable).