Your experience of PMS is not based on your thoughts or beliefs. You don't get PMS because you believe you will get PMS (unless you are a hypochondriac). Rather, your experience of PMS is based on the collective beliefs, the river of thought, of that which created you.

In other words, it's just the way your body works. However...

Many bodily processes are directly or indirectly influenced by the mind. Visualization can bring about chemical changes in your body that can have a positive effect on your well-being during periods of hormonal imbalance. How you visualize this will depend on what is most meaningful to you; some people surround themselves in golden light, others imagine their endocrine system rebalancing itself.

You can also teach yourself to control your body through biofeedback. This technique has the virtue of being scientifically proven. Call it "enlightenment through superior technology," if you will. See here for more thoughts on this.

Another way is to reframe the discomfort. People who are deeply engaged in some life activity they are passionate about seldom notice discomfort, or if they do notice, it doesn't matter so much because the passion overcomes the discomfort.

Finally, you can raise your vibrational level high enough to overcome the discomfort. I don't claim to know a lot about this, but those who live life in a more or less constant state of bliss seldom seem to be troubled by health problems.

Let it be OK and don't fight it much. Tell yourself you will soon be feeling much better, and that it's temporary!

Check this out : Abraham Hicks on PMS and finding a right mate: