I suffered for years with extreme pain, mood swings, PMT, the lot! I got to such a point that I felt I couldn't go on with it any longer, then discovered natural progesterone cream which you can get on prescription from your doctor, or if he/she's still living in the dark ages of "it's all part of being a woman!" you can buy it via the internet from the USA.
It really has been a miracle cream as far as I'm concerned and would recommend it to anyone who has any period/fertility related problems.
A very useful site which gives good information about it is
www.johnleemd.com
I hope you soon find relief!