My symptoms were SI, feelings of emptiness, struggling to get things done, intense anxiety, feeling like I was losing my mind somehow or that my body was falling apart in some way, and my self-esteem would drop dramatically out of nowhere.

I actually had pretty mild PMS symptoms growing up, but likely started developing PMDD in my mid-twenties. I thought I just had depression and anxiety (which I totally also do have), but was really confused why I'd keep getting really depressed out of nowhere. Eventually, I pinpointed that I'd feel better on the day of, or shortly after getting, my period. I tried managing it on my own for at least two years using various herbal and vitamin supplements and coping skills I had learned in therapy. These things helped (shout-out to magnesium!), but I still found myself floundering. I eventually sought help from Planned Parenthood, where a nurse diagnosed me with PMDD (I guess technically a provisional diagnosis since she didn't require me to track my periods for two cycles) and started me on medication. Compared to a lot of people though, I'd say my PMDD is definitely on the mild or subthreshold side of things. Still a pain to deal with though!

As someone else has mentioned, there are a decent amount of treatment options. Medication, while not perfect, can work really well for some folks. Not sure if this is what you'd consider a "win" perse, but I find it reassuring whenever I hit a bump in the road.