Advice please

Okay so I was supposed to start yesterday. I've had cramping this whole week which is odd for me and my boobs hurt but that normal. I thought I started this morning with very little brown discharge when I wipe. It's not gotten any heavier all day and I took a test but only looked after a minute and then threw it away. I went back into the bathroom and looked at it again and I see a line. Is it just a bleed line or?