Vitamins, shmiteamins. Are you sure you're making a big deal out of nothing? This is my take on PMS;.. It is the only time of the month we see things clearly! All those surface emotions we have are because we are sensitive to reality for only 1 or 2 weeks out of the month, and we must deal with it head on. 
I love my PMS! I've learned how to embrace it! I am smarter and more creative than any other time of the month, I speak my mind, and stick up for myself with confidence, I cry if I feel like it, I pig out, I express myself and how I really feel about everything going on in my life, and with the people around me. I say, run with the emotions you feel, don't cover them up or wait until they blow over. PMS is a blessing to women, not a curse!