Welcome to TS!
There’s a thread about hormone issues if you want to check it out
No PMDD patient here but I had other issues.
You need a fitting therapy and stick to it. When your symptoms are constantly interlinked with the natural hormonal cycle, you can consider taking it offline by taking contraceptives long term constantly, no bleeding pause. That’s a common therapy for endometriosis and might work for PMDD too. Are there special clinics for hormon related female health issues you can check in in your region?
I would suggest psychotherapy too as the symptoms severely influence mental health too.
Come here, share, vent away, you are not alone 