New Diagnosis - Peri vs PMDD??

I’ve suspected for a few months now that I’ve had PMDD. I’ve been working with a naturopathic doctor to try to address the issue, but today had the first discussion with my OBGYN about my suspicions. She is treating me for PMDD for now by supplementing progesterone during my luteal phase. I’ll start this next cycle.

However., what she said next shocked me! I’m only 28, and she brought up the possibility of this actually being peri menopause depending on how I react to the progesterone therapy. Has anyone else had a similar diagnosis/possible diagnosis this young? My main symptoms have been severe fatigue during my luteal phase, rage, irritability, anxiety, horrible sleep and drenching night sweats which I guess do sound like possibly either diagnosis?

I’m terrified to be pre menopausal at 28!