I've been diagnosed for PMDD - It's utterly hideous.
I always had mood swings before my periods but they got worse and worse as I got older. When I became pregnant, I also became suicidal and terminated at 12 weeks as I was going to kill myself - never had any MH issues before and never had any anti depressants.
After that, every month my mood would drop further and further and it was like I was a different person.
Imagine a 'normal day' -
Highly paid, very professional job in very buoyant market, great Husband with no relationship problems, lovely family and friends, lots of hobbies etc....(obviously my life isn't perfect at all... but I'm mostly happy with my day to day life!)
Then before my period -
My Husband is obviously cheating on me with prostitutes, my sister hasn't replied to my WhatsApp message I sent 10 minutes ago as she hates me as I've somehow offended her and now she's slagging me off to my other sisters. My friends are all bored of me and don't want to meet me and are only doing it out of pity. My Boss went into a meeting with his Boss and I know it's about me and they're going to sack me and I'm going to be unemployed and won't find another job as I'm useless... I actually don't know why I stay alive, there is no point, I have nothing going for me, I'm overweight and noone cares......
It's almost like a psychosis and every month for 7-10 days I was having to literally 'mask' these feelings and thoughts. The only way I could get through it and literally 'endure' it was to not see anyone, cancel all meetings with friends / read - reread and then re-read again every single text message in case it 'offended' someone and then wait ten minutes before re-reading it before sending it I really had to reply. Same with work emails. It was exhausting.
As soon as my period came - The switch was flicked back and I couldn't believe I had these thoughts in my head as my life really isn't terrible and I don't believe anyone hates me or thinks I'm incompetent... ... but then 3 weeks later, my mood would decrease again and I'd be thinking those same thoughts and nothing anyone could say or do would change that.
I am very lucky that my Husband is incredibly supportive and at no point has he ever got angry with me saying 'I can't believe you changed the bedsheets before I got home, you're obviously sleeping with someone during the day"so he'd point out that we have CCTV outside.... he'd point out he did it so the washing machine was free for my gym gear later on... he'd offer me his phone / email to read (I've never said yes as I think this is a slippery slope) but he'd do anything to reassure me he wasn't cheating - but how exhausting for him and what a horrible thing to have to live through, knowing every month your wife is going to assume you're cheating / you're going to leave etc.....
Thankfully I have really supportive GP's and after trying a number of herbal / non prescription things, I accepted that I needed something more and after trying a few different anti-depressants, found that fluoxetine (prozac) was a game changer for me. Just 10mg so the lowest dose possible.... but that is enough to effectively 'block' the hormones and make my life so much more stable.