So I Thought I Was Pregnant As I Had All

So I thought I was pregnant as I had all the symptoms.. Sore breast, nausea, extreme fatigue, milk coming from nipples, really bad mood swings and aching back pain. I had really bad cramps but now, 2 days before my period was due i have bleeding. At first it was light and orange but now it has gotten a bit darker and heavier. I'm just wondering what you's all think.. I was going to buy a pregnancy test and not sure if to do that now.. If so when will I take the test?