4. Period Changes
Of course, the most obvious period-related symptom of PMS is the fact that your periods will stop: Everyone knows that women will eventually cease to experience their menstrual cycle. But that’s not necessarily a symptom of PMS as it is an end result. The truth is that right before you are set to go through PMS and while you are actively experiencing it, your period will change.
Take note of your period cycles and any changes in frequency or flow. Changes like a skipped period can happen because of plenty of reasons, including stress, but it can also point to PMS or early-onset PMS, so consult with your doctor to rule out the different causes that your period might be changing: There are times where it might not be PMS, but things like a changing or heavy flow could point to more serious health problems like endometriosis or internal bleeding.