Cramps and brown spotting

My period is supposed to start in seven days. It is very regular/always comes when expected. I have never experienced this before but for the last two days I have had brown discharge when I go to the bathroom and today I am having several period-like cramps and am slightly bloated also. It is still too early to test- I am going to wait a few more days. Are these just early PMS symptoms or am I possibly pregnant? Who else has had this?