PMS starts two week before your menstruation start.Your mood swings,you cry or you irritable.I hope, you are fine, you feel good.
http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0002474
All it is. is when ur period is about 2 start u have diff thing 2 happen like cramps, mood swings, fatigue, your bloated but most people dnt pms its calld pre-mentral sydrome look over spelling but thts all it is