Here's a different way to look at it.
Why not just say "Oh I'm OCD" when you like your desk organized a meticulous and specific way? OCD does seriously affect people, does it not? Everyone wants something done a very specific and organized way, so it must affect everyone, right?
The answer for hormones is the same. Hormones don't affect all, or even most, women to the extent of altering behavior like that. If they do, it's a serious condition.. and yes, you do need to seek help just like you would if you were depressed or bipolar.
Hormones can make you: more irritable, more sensitive, hungry. You know what else can make you more emotional? Hunger, stress, love. All of which are within a range that you have perfect control over. You can be more frustrated than normal and take a deep breath, we've done it plenty of times at work or in public when it wasn't ok to snap. If you can't or more likely won't control yourself, then you have the option of walking away or telling your partner you need a break and taking a long shower.
So, yes. If you have a medical condition, fine. You have my sympathy. But get help, and don't use it as an excuse to continue unpleasant behavior. It's not ok for a schizophrenic person to not take their meds and then go through an episode anymore than it's ok for a "hormonal" person to refuse to take medication and act like an insufferable bitch.
Mental issues are never an excuse to treat other people poorly, nor do they absolve you from personal responsibility to act like a decent person and seek help.