"A few days before my period I get a real mood swing and feel very tired, moody and feel like the world is against me. Can marijuana stop this feeling?"
The short answer is, it might! The estrogen and progesterone cycles are responsible for mood swings many women experience during PMS and prostaglandins are responsible for pain and discomfort. There are several properties within cannabis that may be helpful for PMS in general.
Some women report that indica can be helpful for alleviating pain and inducing relaxation in the evening.
Hybrid strains with both indica for comfort and sativa for mood elevation / stabilization have also been helpful. Some examples include Obama Kush, Blue Dream, and Dutch Treat.