My period is due today, but I've been spotting since Friday. It started as just a bit of red blood, like usual so I put on a pad. After that it was just pink spotting & I only see it when I wipe. Then on Sunday I had another gush of red. I thought it was just turning into my normal heavy flow, but it went right back to the spotting. Today I'm still spotting, but now there's cramps too. Is this just a strange period, or something else?