So PMS aka pmdd is an imaginary problems that women "invent" am I right?

PMS. No you are wrong.It is a real medical condition and not an imagination with symptoms which are recurrent and related to menstrual cycle.
Not at all. Pms and pmdd are very real. These patients have symptoms which occur right before the menstrual cycle due to to the fall in female hormone production. The key is that these symptoms are absent through the rest of the cycle.