I had horrendous periods as a teenager, really painful, accompanied by migraine, upset stomach, frequent fainting and often throwing up from the pain. I was also told it would improve after I had a baby and was a bit
about it, but actually it did. From having ds1 9 years ago I have only ever had a bit of cramping - until recently.
I am not allowed to take hormonal contraceptives of any kind, so they were never an option for me.
In June this year I started a healthy eating and exercise plan. I have lost just over 2 stone, really toned up and lost lots of inches using the 30 day shred video and doing a lot of walking. I don't eat refined sugar or processed food, drink caffeine or alcohol, have a very low sodium intake and work out daily.
So, in theory I am now doing everything right to prevent pmt and period pains, but it seems to have had the exact opposite effect.

I now suffer from pmt for two weeks before my period starts, have started having migraines in the week before again and have ridiculously tender and sore boobs, bloating, water retention, constipation followed by dreadful upset stomachs and finally excruciating cramps, back-ache and as of last month fainting. The only thing that helps alleviate the pain is to do some exercise, but I can only do that after the first day or so because I am so bad with all the other symptoms.
The other odd thing that's been happening is that I seem to stop bleeding completely for a whole day on day 3, then start again on day 4, every single month. I have absolutely no idea why that would happen, or why its always on the same day, but I'm sure it must mean something. 
To say I am a bit pee'd off about it would be the understatement of the century.
I can only assume that it has nothing to do with my new regime, but is most likely down to my age (41) and I am probably peri-menopausal and if this is what things are going to be like from now, well I can't bear the thought really.